Fixes unit test and another potential migration problem using an old alias for foreign key
Merge remote-tracking branch 'origin/6.2.0' into 7.1.0
Not sure how the logout button ended up in the help dialog, sorry! :)
Don't try to access model.value when model.value might be empty. Fixes broken prevalue editor for RTE.
Fixes last error in U4-3470 Errors in console window are failed to load resource at

/umbraco/%7B%7Bcmd.icon%7D%7D
Better styling of ChangeDocType dialog
Change to overflow:auto so there's no horizontal scroll bar when not necessary
Quick fix for U4-4206 - not the absolute correct fix, but it'll get rid of that horrible null reference error
No more need for imageprocessor configs in web.config, yay!
Merge
Fixes: U4-4477 Media picker doesn't show thumbnail any more
Minor addition to the U4-4477 fix
Revert "Merge"

This reverts commit 1573eb2f74ca104352852cd224b23188c9a9302c.
Fixes: U4-4477 Single Media picker doesn't show thumbnail any more
Final tweak to the U4-4477 - media items could not be retreived on refreshing the editor
Make sure we use the latest ImageProcessor version in VS as well, not just in the nuget package.