gui: use the over composer in the button repaint function
commit2cea4c585d04ba6729a55fa46ff3c45fdd514a70
authorMaurizio Lombardi <mlombard@redhat.com>
Thu, 18 Oct 2018 22:33:54 +0000 (19 00:33 +0200)
committerJakub Jermar <jakub@jermar.eu>
Fri, 19 Oct 2018 07:51:49 +0000 (19 09:51 +0200)
tree20e06fbf476b2adcaa4239bd54558328a9838088
parent4fff3c7d31249ac9235b574b27bd61512b9907e4
gui: use the over composer in the button repaint function

When repainting a button, the foreground and background colors
should be properly mixed by using the over composer.
The default src composer is not good enough.
uspace/lib/gui/button.c