add missing RESTORE_REGISTER to shortcut TS rendering
Gridelements is adding a LOAD_REGISTER in tt_content.shortcut.5 to set the recursion field. This however is not restored/removed again afterwards by a RESTORE_REGISTER.
In my particular case this is breaking automatic image scaling in multicolumn gridelements which relies on a proper register holding the calculated contentWidth. Might also have other sideeffects on nested renderings.
Fix is to add "tt_content.shortcut.30 = RESTORE_REGISTER" to the setup.txt