Index: core/plugin/settings/multiselect.rb
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- core/plugin/settings/multiselect.rb	(revision 1298b1f8df13fa0b4a3a9de164a0380536bd534f)
+++ core/plugin/settings/multiselect.rb	(revision )
@@ -69,7 +69,7 @@
     if setting.is_a? Gtk::Widget
       ->(widget) do
         if widget.active?
-          listener.set((listener.get || []) + [value])
+          listener.set((listener.get || []) + [value]) unless (listener.get || []).include?(value)
         else
           listener.set((listener.get || []) - [value]) end
         setting.sensitive = widget.active?
@@ -77,7 +77,7 @@
     else
       ->(widget) do
         if widget.active?
-          listener.set((listener.get || []) + [value])
+          listener.set((listener.get || []) + [value]) unless (listener.get || []).include?(value)
         else
           listener.set((listener.get || []) - [value]) end
         false end end end