Flat UI To-do list

The whole point of making this wiki is to sandbox my flat UI experiments. I don't wanna break PvZ Fanfic wiki's layout just because I add something like this.

TODO

 * Change the on-hover button highlights to one solid color.
 * Remove most curves in most of the elements, especially buttons.
 * Change the check box into one solid color.
 * Simplify pictures and backgrounds in buttons.
 * Fix the wiki navigation container, so that it stretches out to the rightmost side of the page.
 * "Modernize" the edit pencil icon.
 * Remove most of the line borders in some elements.
 * Make a hero image for the main page

Note that this wiki WON'T have a chat page, so I won't bother making it.