+ /// move up/down in a text inset, called for LFUN_UP/DOWN,
+ /// return true if successful, updateNeeded set to true if fullscreen
+ /// update is needed, otherwise it's not touched
+ bool upDownInText(bool up, bool & updateNeeded);
+ /// move up/down in math or any non text inset, call for LFUN_UP/DOWN
+ /// return true if successful
+ bool upDownInMath(bool up);