Abort topic edit when config is changed.

Change-Id: I4f7c19c54d9733f029985dce13e7cfcae226c632
Fixes-Issue: CLIENT-465
Reviewed-on: http://gerrit.dmdirc.com/3211
Reviewed-by: Chris Smith <chris@dmdirc.com>
Automatic-Compile: DMDirc Build Manager

src/com/dmdirc/addons/ui_swing/components/TopicBar.java

@@ -375,7 +375,8 @@ public class TopicBar extends JComponent implements ActionListener,
     /**
      * Load and set colours.
      */
-    private void setColours() {
+    private void setColours(){
+        cancelTopicEdit();
         backgroundColour = UIUtilities.convertColour(
                 colourManager.getColourFromString(
                         channel.getConfigManager().getOptionString(