Prevent long handle stretching user menu (adds ellipsis).
Remove handle when avatar is present, but keep handle when no avatar.

Add theme option to use Google Fonts.

Sidebar now toggled based on media queries only.

Fixes #190

Closes #189

Inconsistency between media queries and qa_is_mobile_probably()

Shrink user avatar height and prevent overlapping (fixes #170).
Add hidden and flagged styles (fixes #168).
Add label to Login icon.
Move a function back into qa-theme.php.

From PRs by @pupi1985 (unmergeable due to file structure changes).
Closes #69.
Closes #126.

Fixes #114

Reduce unnecessary nesting

Line up h1 and search box.
Reduce nesting of search classes.

Removed some default table stylings.
Set borders on wide form table only.
Add colors for error/success messages.
Reduce some selector nesting.