don't allow to click unload plugin button twice

CHANGELOG

@@ -3,6 +3,7 @@ minerva (14.0.8) stable; urgency=medium
     regression 14.0.7)
   * Bug fix: upload of data overlay with two entries having different uniprot
     identifier but pointing to the same gene crashed (#1083)
+  * Bug fix: don't allow to remove plugin twice (#1081)
 
  -- Piotr Gawron <piotr.gawron@uni.lu>  Thu, 23 Jan 2020 12:00:00 +0200
 

frontend-js/src/main/js/gui/PluginDialog.js

@@ -122,6 +122,7 @@ PluginDialog.prototype._createPluginGui = function () {
     var removePlugin = (function () {
       var pluginToRemove = plugin;
       return function () {
+        $(this).attr("disabled", true);
         return pluginManager.removePlugin(pluginToRemove).then(function () {
           self.close();
         }).then(null, GuiConnector.alert);