Suggest for fixing auto close after press 'apply' in options.

[Yuki-Soul]

Hi again, i've been long searching app to tagging my media from internet. and after testing hydrus i like it. This time instead of feature request i want to suggest for fixing auto close after press apply in options. im using hydrus v507. when i playing with colours and style in file->options. its kind a annoying when you just want to see how the color changes but you must close the options menu, with means you must click multiple times to back to the color you want to change. so i hope that when pressing apply button user can be stay in options menu. if you want the feature to exit after make the third button that say 'OK' means apply and exit.

also for example options->colours->default>thumbnail background. it have 4 color. well i can figure out what is color 1 & 2 is (by closing and opening options menu a few times). but what is 3&4 is changing for i cant see anything changed. i hope it have any explanations.