mouseover text on group toggle button inconsistant and breaks RTL support

Replication Instructions Disable AJAX in your profile Navigate to a course Turn editing on Inspect a Group Mode toggle icon for an activity in your browser (I'm using Chrome) You'll find that the text for the anchor and image's alt and title text differs Note that the icon and parent anchor have a mixture of titles Edit the Course Settings to set "Force Group Mode" to "Yes", and 'Group Mode' to something other than 'No Groups' Inspect a Group Mode toggle icon for an activity in your browser (I'm using Chrome) You'll find that the text for the anchor and image's alt and title text differs Edit the Course Settings to set the Course Format to 'Social' Add the 'Social Activities' block Inspect a Group Mode toggle icon for an activity in the block You'll find that the text for the anchor and image's alt and title text differs Turn AJAX back on in your profile Refresh the page Rinse, Wash Repeat Testing the fix The above instructions still apply, but the alt and title text should no longer differ