Create a feature to reset the view to the starting point (camera)

[stefanrinderle]

Create a feature to reset the view to the starting point (camera)

[stefanrinderle]

Had more issues during the implementation as expected beceause react does only catch the key events on "input"-like fields. Added comments in the code for details and to prevent further work on this.

I also think that the "r" key is enough and that we do not need a button in the view for that. Therefore, ready for review :-)

[stefanrinderle]

Some more work to do - see closed pull request #88

The keydown event is registered to the window: We cannot in good conscience add an Input field, because the event will still trigger anytime I type a "R"...
This also effects other SonarQube fields (eg. search).

[yvo-niedrich]

What do you think of this? The legend is only visible, when the scene is the active element (and it is not toggled away).

We still listen to all the keydown elements on document, but we only act on them when the Scene is active.

I've got the code functional, but I have to clean up a little bit and fix the tests (most likely).

[stefanrinderle]

I like it and would use this approach.

The only think is that I'm not sure if the buttons will disturb heavy users because they know which button to press. But would wait for anyone to complain about it before changing it. One possible solution would then be to use a browser cookie or something equivalent to save the "toggle legend" state over sessions.