position of tab changed to relative for plugins

frontend-js/src/main/js/plugin/PluginManager.js

@@ -7,8 +7,8 @@ var GuiConnector = require('../GuiConnector');
 
 var Promise = require("bluebird");
 
+// noinspection JSUnusedLocalSymbols
 var logger = require('../logger');
-var Functions = require('../Functions');
 
 
 function PluginManager(options) {
@@ -71,7 +71,7 @@ PluginManager.prototype.addPlugin = function (options) {
       configuration: self.getConfiguration(),
       map: self.getMap()
     });
-    plugin.addListener("onUnload", function(){
+    plugin.addListener("onUnload", function () {
       tabData.content.parentNode.removeChild(tabData.content);
       tabData.title.parentNode.parentNode.removeChild(tabData.title.parentNode);
     });
@@ -101,6 +101,7 @@ PluginManager.prototype.createTabForPlugin = function () {
     self.getElement().style.height = "100%";
     self._tabData = guiUtils.createTabDiv({element: self.getElement(), id: "plugin_tab"});
     tabData = self._tabData;
+    $(tabData.content).css('position', 'relative');
   }
   return guiUtils.createTab({
     title: "",