Add support for HiDPI screens

Hi Andrew! Thanks for reporting this issue - any chance you could attach a screenshot to this bug, so I can attempt to see what's going on? Thanks

Here you go
as you can see, once in the app for any page it looks great, but on the
grid pages there is something strange going on with the text/elements
I should also mention i've got text scaling enabled globally, because with
this screen resolution doing without it is very difficult, and that's
probably a factor in this weirdness showing up

On Fri, Aug 1, 2014 at 3:46 AM, pgg <email address hidden> wrote:

> Hi Andrew! Thanks for reporting this issue - any chance you could attach
> a screenshot to this bug, so I can attempt to see what's going on?
> Thanks
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1350670
>
> Title:
> app content/text doesn't seem to scale with hidpi
>
> Status in App Grid:
> New
>
> Bug description:
> I have a hidpi screen, and I'm running ubuntu gnome 14.04
> The elements inside the app don't scale, so text overlaps itself between
> different apps and there is a huge empty blank space on the right side of
> the main page
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/appgrid/+bug/1350670/+subscriptions
>