Wizard: move "validation error" string from message to title

idea/idea-new-project-wizard/src/org/jetbrains/kotlin/tools/projectWizard/wizard/NewProjectWizardModuleBuilder.kt

@@ -164,7 +164,7 @@ abstract class WizardStep(protected val wizard: IdeWizard, private val phase: Ge
             is Success<*> -> true
             is Failure -> {
                 val messages = result.errors.joinToString(separator = "\n") { it.message }
-                throw ConfigurationException(messages)
+                throw ConfigurationException(messages, "Validation Error")
             }
         }
 }

libraries/tools/new-project-wizard/src/org/jetbrains/kotlin/tools/projectWizard/core/errors.kt

@@ -68,7 +68,7 @@ data class VersionIsNotInRangeError(val subject: String, val version: Version, v
 
 data class ValidationError(val validationMessage: String) : Error() {
     override val message: String
-        get() = "Validation error: $validationMessage"
+        get() = validationMessage.capitalize()
 }
 
 data class InvalidSourceSetName(val name: String) : Error() {