Revert Outline around focused elements as it does not fully work

Only show the ouline when the keyboard is used (do not show the outline when mouse is used)

Credit: http://stackoverflow.com/a/18000821

top menu calendar navigable with keyboard.

Use username consistently instead of login #9372

Revert "widget title bars tabbable."

widget title bars tabbable.

Add border to outline currently focused element, when using app with keyboard

Skip two UI tests that randomly fail

Tooltip on user icon for anonymous user should not say "Personal emai…

Made changes to widget backgrounds.

Try to use path from MySQL "secure_file_priv" system variable for batch inserting via load infile

UI tests: Contrast for close button https://github.com/piwik/piwik/pull/9572  https://github.com/piwik/piwik/issues/9155

Only track a ping if window actually has the focus