Merge pull request #8 from GeographicaGS/dev-malkab

Dev malkab
Contributions tools improvements: loading dialog, comparison tooltip, hover select arc
Clean legend on remove
Improvements and bug fixing contributions tools
Help in tool_view.js
Fixed bug in comment getter.
Merge branch 'dev-malkab' of github.com:GeographicaGS/Elcano-iepg into dev-malkab
Merge branch 'dev' of github.com:GeographicaGS/Elcano-iepg into dev-malkab