contents menu: fix not being able to put stuff into f.e. construction sites by ignoring the OCF check when collecting; allow Clonks to take stuff out of containers even if hand is full
custom GUI: OnClick action is now only triggered after a mouse-up that follows a mouse-down

Otherwise ingame actions (triggered by mouse-down) will have their corresponding mouse-up already select an option in a menu.
menus: fixed two possible null-reference errors