[kcm/kwinrules] Extend upper limit of position and size spinners
Currently, the spinners used to edit position and size rules have an upper
limit of 4098, which may be not enough for wide/hdpi/mutiple screens.
The property itself has no such limit in the .kcfg schema
This is just an issue with the editor.
BUG: 421892
FIXED-IN: 5.19