New Trongate MX Features & Form Submit Fix

Introduced 'mx-during-request' and 'mx-after-swap' attributes to enhance user experience in Trongate MX. The 'mx-during-request' controls the appearance of elements during AJAX requests, while 'mx-after-swap' allows executing JavaScript functions after content swaps. Refactored app.js to add a feature that closes open modals when clicking outside of them (which was surprisingly tricky!). Special thanks to our very own Godfather of Speed Coding, Dafa, for fixing the recent glitch with the form_submit() helper method. Everything's smooth and running perfectly now!