yet another fix for plugin installer

Author: alexbruy

python/plugins/plugin_installer/installer_gui.py

@@ -592,15 +592,15 @@ def upgradeAllClicked(self):
   def installPluginClicked(self):
     if not self.treePlugins.currentItem():
       return
-    key = plugins.keyByUrl(self.treePlugins.currentItem().toolTip(5))
+    key = plugins.keyByUrl(self.treePlugins.currentItem().toolTip(6))
     self.installPlugin(key)
 
 
   # ----------------------------------------- #
   def uninstallPluginClicked(self):
     if not self.treePlugins.currentItem():
       return
-    key = plugins.keyByUrl(self.treePlugins.currentItem().toolTip(5))
+    key = plugins.keyByUrl(self.treePlugins.currentItem().toolTip(6))
     self.uninstallPlugin(key)