Implement "move expression up/down" action handler

idea/testData/codeInsight/moveUpDown/closingBraces/if/if1.kt

@@ -0,0 +1,10 @@
+// MOVE: down
+fun(n: Int) {
+    if (n > 0) {
+
+    }
+    else {
+
+    }<caret>
+    val x = ""
+}

idea/testData/codeInsight/moveUpDown/closingBraces/if/if1.kt.after

@@ -0,0 +1,10 @@
+// MOVE: down
+fun(n: Int) {
+    if (n > 0) {
+
+    }
+    else {
+
+        val x = ""
+    }<caret>
+}

idea/testData/codeInsight/moveUpDown/closingBraces/if/if2.kt

@@ -0,0 +1,11 @@
+// MOVE: up
+// IS_APPLICABLE: false
+fun(n: Int) {
+    if (n > 0) {
+
+    }
+    else {
+
+    }<caret>
+    val x = ""
+}

idea/testData/codeInsight/moveUpDown/closingBraces/if/if3.kt

@@ -0,0 +1,11 @@
+// MOVE: down
+// IS_APPLICABLE: false
+fun(n: Int) {
+    if (n > 0) {
+
+    }<caret>
+    else {
+
+    }
+    val x = ""
+}

idea/testData/codeInsight/moveUpDown/closingBraces/if/if4.kt

@@ -0,0 +1,11 @@
+// MOVE: up
+// IS_APPLICABLE: false
+fun(n: Int) {
+    if (n > 0) {
+
+    }<caret>
+    else {
+
+    }
+    val x = ""
+}