Convert all interface icons to support other resolutions

[nuttyartist]

We need to convert all interface icons to other resolutions to support different displays resolutions. We mainly need to convert them to: 32x32, 16x16 and 12x12

(Are there other resolutions we should consider?)

[alex-spataru]

I think that the most viable way is to use vector icons (e.g. SVG) instead of PNG, which will render the icons resolution-independent.

[nuttyartist]

mm... that might be good. Can we do that in Qt? Can it show an .svg icon the same way as a .png? If so, I think for the simple icons, that might be a good approach, but for a bit more complex ones, maybe vector resizing may not look good or accurate and we should export them as different .png's.

[theshadowx]

Well I tried to use svg, but it didn't work well. As I think internally the svg is converted to png and do not look good.

[nuttyartist]

@theshadowx ah, ok. Then, .png it is.

[theshadowx]

@nuttyartist maybe I've done something not correct, try to use from svg from your side and see if it working correctly.

[nuttyartist]

@theshadowx Alrighty, I've changed the milestone to the Next Next Release because it would fit with supporting HiDipi issue on that milestone.

[nuttyartist]

With the transition to font icons this issue can be closed now.