Proof-of-concept desktop keyboard navigation

[yolpsoftware]

These changes allow the user to navigate through the browser using Tab and Shift-Tab.

[codecov]

Codecov Report

Merging #278 (dbecaff) into master (a4d1904) will decrease coverage by 0.32%.
The diff coverage is 9.75%.

@@            Coverage Diff             @@
##           master     #278      +/-   ##
==========================================
- Coverage   58.91%   58.59%   -0.33%     
==========================================
  Files         271      272       +1     
  Lines       12176    12257      +81     
  Branches     1262     1274      +12     
==========================================
+ Hits         7174     7182       +8     
- Misses       4716     4786      +70     
- Partials      286      289       +3     

Impacted Files	Coverage Δ
SafeExamBrowser.Browser/BrowserApplication.cs	0.00% <0.00%> (ø)
SafeExamBrowser.Browser/BrowserControl.cs	0.00% <0.00%> (ø)
SafeExamBrowser.Browser/BrowserWindow.cs	0.00% <0.00%> (ø)
...terface.Contracts/Browser/Data/JavascriptResult.cs	0.00% <0.00%> (ø)
SafeExamBrowser.Client/ClientController.cs	93.55% <33.33%> (-0.94%)	⬇️
...afeExamBrowser.Browser/Handlers/KeyboardHandler.cs	69.38% <35.71%> (-13.47%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a4d1904...dbecaff. Read the comment docs.

[dbuechel]

Great work, thanks a lot @yolpsoftware! There unfortunately were some changes which are causing merge conflicts, so it'd be great if you could resolve these. Furthermore, if you'd have the time then it would be awesome if you could also translate all the new text into the other three languages (using Google Translate).

[dbuechel]

Thanks a lot for the quick fixes @yolpsoftware. There are only 3 minor things left, once resolved I'll immediately approve and merge the pull request. Great work indeed 👍

[yolpsoftware]

Had to adapt some code to the changes introduced by 7142380#diff-86bb6b5aa3ce5d57bf4a50c8682d6b4dbb47f45b4b69499e758ea166d571093e.

[dbuechel]

Excellent, thanks for the quick fixes. Looks all good to me now 👍