[FEATURE] Adds a state hover effect to the unlink buttons

Resources/Public/Plugins/Typo3FileManager/typo3filemanager.js

@@ -125,7 +125,8 @@ var plugin = tinymce.PluginManager.add('typo3filemanager', function(editor, url)
 		title: 'Unlink',
 		icon: 'unlink',
 		shortcut: 'Ctrl+M',
-		cmd: 'unlink'
+		cmd: 'unlink',
+		stateSelector: 'a[href]'
 	});
 
 	//editor.addButton('typo3image', {
@@ -143,7 +144,8 @@ var plugin = tinymce.PluginManager.add('typo3filemanager', function(editor, url)
 		prependToContext: true,
 		shortcut: 'Ctrl+M',
 		icon: 'unlink',
-		cmd: 'unlink'
+		cmd: 'unlink',
+		stateSelector: 'a[href]'
 	});
 
 	editor.addMenuItem('typo3link', {