editors: remember Settings collapse status based on containing editor class
editors: remember Settings collapse status based on containing editor class

Issue 728 related change.

HelioGuilherme66/RIDE,fingeronthebutton/RIDE,HelioGuilherme66/RIDE,HelioGuilherme66/RIDE,caio2k/RIDE,robotframework/RIDE,robotframework/RIDE,caio2k/RIDE,fingeronthebutton/RIDE,fingeronthebutton/RIDE,caio2k/RIDE,robotframework/RIDE,HelioGuilherme66/RIDE,robotframework/RIDE