rollback: remove transparent color.

Signed-off-by: liuyanghejerry <liuyanghejerry@126.com>
write a sample for BasicBrush - SimplePen, but don't know how to test
it...
Merge branch 'master' of gitcafe.com:liuyanghejerry/painttyWidget
add solidity setting support.
change: change buttons to tool bar for brush buttons.

Signed-off-by: liuyanghejerry <liuyanghejerry@126.com>
Merge branch 'master' of gitcafe.com:liuyanghejerry/painttyWidget into no_transparent
remove: useless developerconsole.
minor change.

Signed-off-by: liuyanghejerry <liuyanghejerry@126.com>
change: move width control to toolbar.

Signed-off-by: liuyanghejerry <liuyanghejerry@126.com>