Moderation Square Undo

Closes #16

See merge request !6

Canvas Freezing

See merge request !5

Fixes #68

More audit logs

See merge request !3

Audit Log

Closes #56

See merge request !1

this also fixes the symbols not lining up on the template styles (there's another gray)

Feat: Template Styles

Closes #71

See merge request !2

- added foundation for server-sent alerts (related #53)

right click & middle click now get triggered by keybinds (uses auxclick event)

- main canvas & blank canvas drawing moved to separate worker thread (if possible)
- server jobs moved to separate process (fixing CPU leak on heatmap generation)
- pixels now store if they are on top reducing db queries
- remove various methods to store pixel data in redis, reducing delay for various actions

additional fixed: (came up during performance fixes)
- added square fill (fixes #15)
- redraw loop (fixes #59)
- added keybind to deselect current color (fixes #54)
- pixel undos no longer delete the pixel from the db
- server logging now indicates what module triggered the log