- Various adjustments to make the new screen parts work in GMod.

GMod didn't like the new version very much. Reverted.

- Change the page background (dark mode + body css background properties);
- Better opacity gradient in the status div;
- Remove the background from loading.png;
- Alert the player if the sv_loadingurl command gets too big;
- Minor html corrections and menu improvements.

- Add support for all gamemodes (ogl_menu command)

The link to a new image was only applied if the player hit enter after writing it

- Rename an option

Initial addon creation.