Rename Symbols (support F2)

[mrmlnc]

Support F2 for all files in the workspace if the file no has symbol with the same name.

[michaeljota]

I don't think right now VScode support name check. I even had renamed some global variables in TS cause of this. So, just global rename I think would be good.

[mrmlnc]

We can safely rename the arguments of mixins inside them.

[Friksel]

+++1

VS Code knows exactly where a scss variable is defined, as we can ctrl-click on any scss variable and go directly to the file and location in the file where the variable is defined. But unfortunately F2 to refactor-rename the variable doesn't work.

Would be a big time saver and less error prone if we could use F2 to refactor-rename variables!

Aside from this; great extension! Love it! Thanks for all the work!