'createboxButton' class was erroneously removed in Ia608324703987371
so add it back again. Also prefixed "inputbox-element" class with
a "mw-" for consitency as well.
Bug: T92611
Change-Id: I36718671e6012427a647de7a1cc712e3c8394ee1
For checkboxes and text input fields, not only for buttons.
Fix missing space between input and submit button in search2, too.
Follow up: Ia608324703987371aa66beccbac962024fc6e897
Bug: T63526
Change-Id: Id9fb22885b836c0dfe6a086e2ec45e2018244210