Use JB colors to avoid problems with different color schemes

- Fix KT-4725 Project wizard: bad font color
- Some warnings fixed

 #KT-4725 Fixed

idea/src/org/jetbrains/jet/plugin/framework/ui/ChooseLibraryPathPanel.java

@@ -1,5 +1,6 @@
 package org.jetbrains.jet.plugin.framework.ui;
 
+import com.intellij.ui.JBColor;
 import com.intellij.util.EventDispatcher;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -29,7 +30,7 @@ public class ChooseLibraryPathPanel {
 
         ActionListener actionListener = new ActionListener() {
             @Override
-            public void actionPerformed(ActionEvent e) {
+            public void actionPerformed(@NotNull ActionEvent e) {
                 actionDispatcher.getMulticaster().actionPerformed(e);
                 updateComponents();
             }
@@ -74,10 +75,10 @@ public class ChooseLibraryPathPanel {
     private void updateComponents() {
         copyFilePanel.setEnabled(copyToRadioButton.isSelected());
         if (copyToRadioButton.isSelected() && copyFilePanel.hasErrors()) {
-            copyToRadioButton.setForeground(Color.RED);
+            copyToRadioButton.setForeground(JBColor.red);
         }
         else {
-            copyToRadioButton.setForeground(Color.BLACK);
+            copyToRadioButton.setForeground(JBColor.foreground());
         }
     }
 }

idea/src/org/jetbrains/jet/plugin/framework/ui/CopyIntoPanel.java

@@ -20,6 +20,7 @@ import com.intellij.openapi.fileChooser.FileChooserDescriptorFactory;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.ui.TextFieldWithBrowseButton;
 import com.intellij.ui.DocumentAdapter;
+import com.intellij.ui.JBColor;
 import com.intellij.util.EventDispatcher;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -47,7 +48,7 @@ public class CopyIntoPanel {
                 FileChooserDescriptorFactory.createSingleFolderDescriptor());
         copyIntoField.getTextField().getDocument().addDocumentListener(new DocumentAdapter() {
             @Override
-            protected void textChanged(final DocumentEvent e) {
+            protected void textChanged(DocumentEvent e) {
                 updateComponents();
             }
         });
@@ -89,10 +90,10 @@ public class CopyIntoPanel {
     private void updateComponents() {
         boolean isError = false;
 
-        copyIntoLabel.setForeground(Color.BLACK);
+        copyIntoLabel.setForeground(JBColor.foreground());
         if (copyIntoField.isEnabled()) {
             if (copyIntoField.getText().trim().isEmpty()) {
-                copyIntoLabel.setForeground(Color.RED);
+                copyIntoLabel.setForeground(JBColor.red);
                 isError = true;
             }
         }

idea/src/org/jetbrains/jet/plugin/k2jsrun/K2JSRunConfigurationEditor.java

@@ -16,7 +16,7 @@
 
 package org.jetbrains.jet.plugin.k2jsrun;
 
-import com.intellij.ide.browsers.BrowserFamily;
+    import com.intellij.ide.browsers.BrowserFamily;
 import com.intellij.ide.browsers.WebBrowser;
 import com.intellij.ide.browsers.WebBrowserManager;
 import com.intellij.openapi.fileChooser.FileChooserDescriptor;
@@ -27,13 +27,13 @@ import com.intellij.openapi.options.SettingsEditor;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.roots.ProjectRootManager;
 import com.intellij.openapi.ui.TextFieldWithBrowseButton;
+import com.intellij.ui.JBColor;
 import com.intellij.ui.ListCellRendererWrapper;
 import org.jetbrains.annotations.NotNull;
 
 import javax.swing.*;
 import javax.swing.event.DocumentEvent;
 import javax.swing.event.DocumentListener;
-import java.awt.*;
 import java.awt.event.ItemEvent;
 import java.awt.event.ItemListener;
 import java.io.File;
@@ -94,26 +94,26 @@ public final class K2JSRunConfigurationEditor extends SettingsEditor<K2JSRunConf
         final JTextField textField = generatedChooseFile.getTextField();
         textField.getDocument().addDocumentListener(new DocumentListener() {
             @Override
-            public void insertUpdate(DocumentEvent e) {
+            public void insertUpdate(@NotNull DocumentEvent e) {
                 onChange();
             }
 
             @Override
-            public void removeUpdate(DocumentEvent e) {
+            public void removeUpdate(@NotNull DocumentEvent e) {
                 onChange();
             }
 
             @Override
-            public void changedUpdate(DocumentEvent e) {
+            public void changedUpdate(@NotNull DocumentEvent e) {
                 onChange();
             }
 
             private void onChange() {
                 File file = new File(generatedChooseFile.getText());
                 if (!file.isDirectory()) {
-                    textField.setForeground(Color.RED);
+                    textField.setForeground(JBColor.red);
                 } else {
-                    textField.setForeground(Color.BLACK);
+                    textField.setForeground(JBColor.foreground());
                 }
             }
         });
@@ -122,7 +122,7 @@ public final class K2JSRunConfigurationEditor extends SettingsEditor<K2JSRunConf
     private void setUpShowInBrowserCheckBox() {
         openInBrowserCheckBox.addItemListener(new ItemListener() {
             @Override
-            public void itemStateChanged(ItemEvent e) {
+            public void itemStateChanged(@NotNull ItemEvent e) {
                 boolean selected = openInBrowserCheckBox.isSelected();
                 htmlChooseFile.setEnabled(selected);
                 browserComboBox.setEnabled(selected);