Laas opgedateer op 2020-10-04

Show short instructions at startupAllow double tapping the floating brightness slider to toggle Underburn on or offFix a crash while resuming the appAdd new icons for the brightness slider, which now spins while draggingOnly allow the brightness slider to move vertically while changing brightnessDo not automatically move the brightness slider to the other side of the screen when dragging too farChange some default settingsThe app should now detect colours better and flicker a lot less