fix calculation of the vertical padding relative to the margin, also fixes an issue dsalt reported about scrollup-animation for the scrollbackbuffer (while it currently remains for aboutinfo and inputfield)
let inputfield and about text fade out despite the scrollup-animationtype… this still will give the overall feel of the choosen animationtype while fixing the issues regarding overhanging lines
don't wait for the animationtimer for con_animationtype == 0
readapt default values and abstract about text line drawing into own function