Adjust background color for the current unit path

Use blue color instead of some dark gray.
Fix editor margins
Display header in delimiter rows (currently as raw Pootle path)
Use arrows instead of triangles as path delimiters — these are more subtle
A more clean way to define editor-specific page styles
Remove editor table empty header; fix top spacing

Conflicts:
	pootle/templates/editor/units/edit.html
Check rendering improvements
Render the unit navigation input in a more subtle way
Cleanup: coding style fixes
Also style as an input when the element has focus and avoid outline
Use a more sensible name
Display project name when available
Partial pick: Cleanup: removed dead template code

Partially picked.

Conflicts:
	pootle/templates/translation_projects/base.html
Don't duplicate project name in the title
More sensible wording
Refactored common template code

Conflicts:
	pootle/templates/projects/admin/languages.html
	pootle/templates/projects/admin/permissions.html
Cleanup: use 2 space indentation
Moved some code to the base admin template

Conflicts:
	pootle/templates/translation_projects/admin/permissions.html