[pgAdmin][RM5101] debugger not showing all arguments anymore after hitting sql error while debug

Hi Hackers,

Attached is the patch to fix the issue where few of the arguments were skipped when opening arguments dialog other than the first time. The issue occurs when any of the arguments in between is an OUT arg.

I've also added a "Clear All" button to the argument dialog which will clear all the saved arguments values from sqlite db. Document updated.

The patch also changes the checkboxes used in the arguments dialog to custom checkbox which matches the theme. This was missed in my previous patch related to the same.

Please review.