Comment out non-working code parts

For details, see code comment
Code cleanup for sidebar tree view and friends
Fix for tooltip error in tree
Delay sharing of draft until the email gets send to avoid sharing drafts
that are never sent
Code cleanup
Merge commit 'a2cbeb94430aff41f733543da0e6228d0b4afe20' into filter

Conflicts:
	code/chrome/content/sidebar.js
Merge branch 'refs/heads/master' into filter

Conflicts:
	code/chrome/content/overlay_tb_main.js
	code/chrome/content/sidebar.js
	code/chrome/content/sidebar_tb_main.js
	code/components/autocomplete.js
Replace "var" by "let" where possible
Merge branch 'master' into filter

Conflicts:
	code/chrome/content/overlay_tb_main.js
	code/components/autocomplete.js
Merge changes from 8c91bb4 into filter