[bug][31538] Smart Search error caused by Array to string conversion in master controller. Fixes #3974
[bug][33734] Don't assume M as suffix for size configuration values in admin/com_media. Fixes #3976
[imp][33921] Use layouts to render form field labels.
Closes #3868
[bug][33805] Only try to find a search page if the request Itemid is not a search page. Fixes #3949
[imp] Update the language string to explain how to use the field. Closes #3978
[imp][31544] Smart Search populateState must not clean input data twice