Some fixed for not getting windows to focus/to front which were inspired by FEATURE-992. [skip ci]

GreenshotPlugin/Core/AbstractDestination.cs

@@ -152,7 +152,8 @@ namespace GreenshotPlugin.Core {
 			var menu = new ContextMenuStrip
 			{
 				ImageScalingSize = CoreConfig.IconSize,
-				Tag = null
+				Tag = null,
+				TopLevel = true
 			};
 
 			menu.Closing += delegate(object source, ToolStripDropDownClosingEventArgs eventArgs) {

GreenshotPlugin/Core/WindowsHelper.cs

@@ -1256,7 +1256,6 @@ namespace GreenshotPlugin.Core {
 		/// </summary>
 		public static void ToForeground(IntPtr handle)
 		{
-
 			// Do nothing if the window is already in the foreground
 			if (User32.GetForegroundWindow() == handle)
 			{