Some UI elements (buttons etc) missing labels and only have mouseover tooltips

Repository page

• Change native tooltip on Browse/Search to tipsy
• Add tooltip for the ".." on directory browse

Source page

• Add title to span if author's name isn't linked

Commit page

• to fix the problem of "tipsy not visible on focus"
• remove the redundant title for the table headers
• add tooltip for the truncated commit message on the commit page ?? bflower
• when the table row is highlighed, the focus style is missing

Pull request list

• remove the native tooltip on the author (or change all tooltip for user into tipsy ? )

Pull request page

• Tipsy for each icon on the comment editor
• Lozenge of the status of the commit should have explanation.

Diff view

• Title for inline comment icon (also, consider using tipsy instead)

Repository setting

• remove redundant title on "move repository" and "delete repository" buttons, as well as on the form fields
• discuss with bflower regarding the tooltips on the headers of permission table .

Admin page

• add focus style for the up/down arrows
• remove redundant titles on form fields