input: fix touch input getting borked on quick tile

The decorationPressId never gets reset as the decoration isn't below the touch point anymore after the quick tile, so if we have no decoration under the touch point reset the decorationPressId to -1.

The bug manifests when you do quick tiling or maximize to screen edge. It ignores the first touch point then until you either tap on the window decoration or un-quicktile with the mouse.