texteditor: Only create pygments warning once .. not like everytime you change tab
texteditor: Only create pygments warning once .. not like everytime you change tab

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