Feature Request - Allow to finish creation of object using right click

[antoniolocandro]

This would probably need a revamp of the tool but it would be more in line with how you do current edits using standard qgis tools, also this would reduce clicking.

e.g. Select Circular Arc Creation tool (just one icon), you select 3 points then right click to finish, tools keeps in that mode until you select another one.

This would speed up digitizing efforts.