Merged in NRRPLT-8916-frontend-sim-tool-for-xpra (pull request #51)

[NRRPLT-8916] Frontend sim tool for xpra

* [NRRPLT-0000] commit package-lock.json

* [NRRPLT-0000] typos fix

* sim tool availability and singleton config

* Merge branch 'NRRPLT-8916-frontend-sim-tool-for-xpra' of bitbucket.org:hbpneurorobotics/nrp-frontend into NRRPLT-8916-frontend-sim-tool-for-xpra

* xpra tool disabled until simulation created

* separated sim tool constants definition, improved xpra availability check

* corrected some cases for availability check

* sim tool button configurable to be shown/hidden + enabled/disabled, xpra adjusted accordingly

* forgot to save

* Merge branch 'development' into NRRPLT-8916-frontend-sim-tool-for-xpra


Approved-by: Viktor Vorobev