Description:

For interlanguage and personal wikis, if a font is selected for live preview and the ULS panel is then closed by clicking on the cog icon (interlanguage) or ULS icon/language name (personal) then the live preview does not stop and the page continues to be displayed in the selected font.

Steps to reproduce:

1. Go to http://mlebtesting.wmflabs.org/stable-interlanguage/core/index.php?title=Main_Page
2. Click on the cog icon to open the ULS panel
3. Select Display -> Font -> OpenDyslexic
4. Confirm that the live preview uses OpenDyslexic font
5. Click on the cog icon again, without applying the changes

Expected Result:

1. Live preview with OpenDyslexic font will stop and the earlier font used (similar behaviour of the 'Cancel' or 'X' button is used to close the panel)

Actual Result:

1. The page still displays with the OpenDyslexic font

Version: unspecified
Severity: normal