[editor] X-Ray mode: handle Ctrl+*, Ctrl, #SCL-23847 fixed

Author: pavelfatin

scala/codeInsight/src/org/jetbrains/plugins/scala/codeInsight/hints/ScalaEditorFactoryListener.scala

@@ -126,6 +126,9 @@ class ScalaEditorFactoryListener extends EditorFactoryListener {
 
     override def keyReleased(e: KeyEvent): Unit = {
       xRayMode = false
+      if (e.getKeyCode != ModifierKey) {
+        firstKeyPressTime = 0
+      }
       keyPressEvent = null
       longDelay.stop()
       shortDelay.stop()