Stubbed preset manager state, added confirm and variable dialogs, variables can now be created, everything is now mutatable

lib/window.rb

@@ -12,5 +12,21 @@ module TAC
     def needs_cursor?
       true
     end
+
+    def close
+      if @backend.config_changed?
+        push_state(Dialog::ConfirmDialog, title: "Are you sure?", message: "Config has unsaved changes!", callback_method: proc { cleanup_and_close })
+      else
+        cleanup_and_close
+      end
+    end
+
+    def cleanup_and_close
+      if @backend.tacnet.connected?
+        @backend.tacnet.close
+      end
+
+      close!
+    end
   end
 end