Added a metric for seeing accumulated time since first visiting the website and specific url
Added a reset button for all time spent in a website and specific urls

Refined exactly when a timer is started and previous time is saved when a tab is activated and updated.

Fixed a race condition when navigating between tabs which caused double counting total elapsed time on websites.

Fixed total time display bug when navigating backwards in a tab. New icon and added links to source code + extension page.

Updated code to run globally from a pop-up panel instead of a large side panel.

Fixed core time tracking functionality across many tabs in a window. Defaulted panel to dark mode.