Added input firewall.
Relaxed matcher rules for userId and clientId
@dborkan comments.
Add sharing enabled icon.
Buddylist changes
Make extension popup a focusable window.
Changes for code review
Merge pull request #639 from uProxy/dborkan-roster

Buddylist changes: remove bytes sent/received and userId, show giving/sharing icons, code cleanup
Merge remote-tracking branch 'origin/dev' into lucyhe-sharing_enabled_icon
Add "Sharing Enabled" info overlay.
Remove description from onboarding, allow users to change it in settings
Change "1st Computer" to "Computer 1", etc
Merge pull request #641 from uProxy/dborkan-roster

Remove description from onboarding, allow users to change it in settings
Merge remote-tracking branch 'origin/dev' into lucyhe-sharing_enabled_icon
Merge with dev
Create uproxy-overlay element.
Merge pull request #618 from uProxy/mling-sanitize-inputs

Added input firewall.
Update comment.
Open popup on app launch. Position popup.
Update comment.