Also fixes the issue Chrome users were having where the extension CSS was being overwritten by KA's CSS, by making the rules more specific. Adding the #page-content parent requirement makes our rules take precedent over KA's more general rules. (I know, it's not elegant.)
Sets a background on the disabled save button so it's not green
Moves around some style rules.
Make all buttons solid blue.
Make all disabled buttons outlined (grayer) blue.
Make the sort buttons on the browse projects page blue.
Adds some comments explaining what rules target what.
Remove the empty text nodes in between some of the program buttons, as they were making the spaces inconsistent.
Force the Spin-off button to have the same amount of right margin as the Save button, overwriting the inline style on that element.
#page-contentparent requirement makes our rules take precedent over KA's more general rules. (I know, it's not elegant.)