SpreadsheetUI : Fix "stuck" tooltips
SpreadsheetUI : Fix "stuck" tooltips

johnhaddon/gaffer,ImageEngine/gaffer,andrewkaufman/gaffer,ImageEngine/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,ImageEngine/gaffer,andrewkaufman/gaffer,hradec/gaffer,andrewkaufman/gaffer,GafferHQ/gaffer,GafferHQ/gaffer,johnhaddon/gaffer,hradec/gaffer,hradec/gaffer,GafferHQ/gaffer,hradec/gaffer,johnhaddon/gaffer,ImageEngine/gaffer,GafferHQ/gaffer,johnhaddon/gaffer,hradec/gaffer,andrewkaufman/gaffer,andrewkaufman/gaffer