Add ability to change/make sidebar icons

[UsernameAdamGits]

Nothing much to this one. The ability to change icons used in sidebar. Also make ones for non-supported extensions like Gmail Sidebar. Thanks.

[Godiesc]

hi, I should add information to change that, you will need to get the new icon (.svg) and added the fill="context-fill" property and add some code to ogx_tricks.css, I will add it in tricks section I guess.

[UsernameAdamGits]

alright, thanks!

[Godiesc]

@UsernameAdamGits hi, sorry for the time taken to make this request, I added the information in a discussions with the steps to follow, I hope you find it useful.

[UsernameAdamGits]

Thanks!