Changed icons for BASE and HEAD, and hide for not SVN (Close #136)

[edgardmessias]

Added green letter "H" for HEAD and blue letter "B" for base.
Hide the icons on non SVN repositories;

[codecov]

Codecov Report

Merging #137 into master will decrease coverage by 0.24%.
The diff coverage is 40%.

@@            Coverage Diff             @@
##           master     #137      +/-   ##
==========================================
- Coverage   41.22%   40.97%   -0.25%     
==========================================
  Files          17       17              
  Lines        1441     1457      +16     
  Branches      227      227              
==========================================
+ Hits          594      597       +3     
- Misses        845      858      +13     
  Partials        2        2

Impacted Files	Coverage Δ
src/extension.ts	0% <0%> (ø)	⬆️
src/model.ts	59.74% <61.53%> (-0.4%)	⬇️
src/svnRepository.ts	65.43% <0%> (-1.24%)	⬇️
src/svn.ts	61.84% <0%> (-0.66%)	⬇️

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[johnjacobkenny]

The new icons do help, but the letters aren't that legible, is there some way to make the letters appear bigger?

[edgardmessias]

You can edit SVGs

[JohnstonCode]

@johnjacobkenny Edit the SVSs and see if you can create something clearer

[johnjacobkenny]

Is there any precedence I should keep in mind for the design of the button?
Also, I haven't worked with SVGs before, do you use any software to edit them? Something like Inkscape?

[JohnstonCode]

Not sure I try not to deal with graphics.

I'm sure a quick google should throw something up.

As long as the design gits in the VS code I'm not fussy.

[edgardmessias]

SVN is like HTML, you can start here: https://developer.mozilla.org/en-US/docs/Web/SVG/Tutorial

Or use Inkscape