Pin loaders page, user admin, cool pin admin

1. Pin Loaders: Remove # from the tag field
2. Pin Loaders: Show full source and product links
3. Recover 'Add to your getlist' function. This function was disabled (by another developer) by changing the
button. I recover the original button as a request from David to
put this button to functional state.
4. Admin - Users: Allow edit of every user field (Picture edit pending)
5. Admin - Users: Change password
6. Admin - Category: Automatically load more items when scrolling down the cool items selection page.
7. Admin - Category: Removes cool item in the background.