Merge pull request #3256 from mehmet-karaman/Bugfix_for_Sticky_Hover_…

…2534

Bugfix for Hover which is visible above other application windows.

org.eclipse.xtext.xbase.ui/src/org/eclipse/xtext/xbase/ui/hover/XbaseInformationControl.java

@@ -514,15 +514,16 @@ public static boolean isAvailable(Composite parent) {
 	@Override
 	public void setVisible(boolean visible) {
 		Shell shell = getShell();
-		if (shell.isVisible() == visible)
-			return;
 
 		if (!visible) {
 			super.setVisible(false);
 			setInput(null);
 			startDisposeTimeout(shell.getDisplay());
 			return;
 		}
+
+		if (shell.isVisible() == visible)
+			return;
 
 		/*
 		 * The Browser widget flickers when made visible while it is not completely loaded.