Fix undo / redo icons according to standard

[vogella]

AFAICS these two icons are also not aligned according to #108

@Michael5601 WDYT?

[vogella]

[Michael5601]

There are many icons that need to be fixed. It's hard to say from your first screenshot if they are not aligned properly. In the second screenshot it is obvious.

I needed 1.5 hours to remake the other two icons and disabled variants and place them into Eclipse. Right now I don't have time to fix all the icons so I focus on only fixing the SVGs that can't be rasterized properly with JSVG as this is directly related with my project.

I think we should still create issues for the problems just to gather them and get a feeling about how much work it would be.

[vogella]

There are many icons that need to be fixed.

True, I picked these two because they are very much visible.

I needed 1.5 hours to remake the other two icons and disabled variants and place them into Eclipse.

Your pull request was so fast, that I had hope that you had tools for this and that this would be super fast for you.

@BeckerWdf can you maybe help here with these two icons?

[BeckerWdf]

@BeckerWdf can you maybe help here with these two icons?

Done. See my 3 PRs.

[vogella]

Thanks @BeckerWdf