Fixed Bugs

#20381 Search UI improvements, button styles removed, Help panel style improved
#18047 Cannot add attachments in HelpDesk Portal under IE
#18459 Exception while changing effort units in Process in particular case
#20379 WYSIWYG: Enter should insert BR instead of P
#19804 [IE] Plugin page becomes empty after any action performed on the other page
#19973 Unnecessary information in History "No Any changes" when edit or attach image from CK editor
#19925 Save and Add New Time Entry causes mandatory Description field to appear for Kanban process
#19631 Typo on the "Cumulative Flow Diagram" page in the TP Help