LastModified checkboxes should be compact-checkboxes

[Gerry Boland]

Comparing with mockups, the Last Modified filter should use compact checkboxes (so is 3 column), not ordinary checkboxes (2 column).

[Mikkel Kamstrup Erlandsen (kamstrup)]

Is it check boxes or radio boxes? I'd guess radio boxes...

In that case we'll need a bit of work in libunity, unity, and unity-2d, as libunity currently only has a CheckOptionFilterCompact class (we'll need a RadioOptionFilterCompact class). The unities will need work to support the new filter renderer type.