remove tab characters
Merge branch 'merge-master-plugin-config' of https://github.com/HeatherHillers/Roam into merge-master-plugin-config
fix typo in legend label
Merge branch '5-plugin-config' of https://github.com/HeatherHillers/Roam into merge-master-plugin-config

Conflicts:
	src/roam/mainwindow.py
Merge branch 'merge-master-plugin-config' of https://github.com/HeatherHillers/Roam into merge-master-plugin-config