We need to harmonise the application toolbar icons with the HIG guidelines

[timlinux]

Problem

Our icon set is rather haphazard. We should have icons that are consistent with the design guidelines for InaSAFE (as per http://github.com/AIFDR/inasafe-graphics ).

@MariaSolovyeva has produced two options as proposed replacements:

or

My preference is for the black outline theme

[MariaSolovyeva]

Here is the updated set of icons, I made a preview with gray background to show the transparency. @timlinux , please let me know if I didn't miss any?

[MariaSolovyeva]

Update: show-impact-merge fix

[timlinux]

That looks really good @MariaSolovyeva - can you give me SVG's for these and we settle on them for now?