Uniform styles

[wesbluemarine]

I think "Cancel" and "Ok" buttons should be like "Close".
Since everything is "roundish", I think the dock background might have rounded top corners like in MacOS Yosemite.

[probonopd]

• The about box could do without any button at all since it is not a dialog.
• The buttons on the right-hand side look wrong because the stylesheet is not applied due to filer-qt --desktop segfaults when stylesheet.qss exists and is not empty QtPlugin#2
• The Dock should not be roundish, we are aiming for a 10.4 feel

[kettle-7]

we are aiming for a 10.4 feel

Ah, my favourite OS X release. It's a shame it's unsupported now.

[probonopd]

With helloSystem/QtPlugin#2 being no more the case at least with Filer,

I think "Cancel" and "Ok" buttons should be like "Close"

is fixed in the upcoming release. Hence cosing.