Mimic legacy behavior for history

Delete existing entry for page before adding new one
Load bookmarks when loading UI

To make sure bookmark panel gets populated on first load
Fix layout while scrolling

The content was going over the button row while scrolling. Set z-index to prevent this.
Update bookmarks realtime after adding new one
Test for Garfonso
Revert "Test for Garfonso"

This reverts commit 34edcfa55814a7ded0eeeb09a0d0889779e29c91.
Merge pull request #5 from Herrie82/master

Minor tweaks & bugfixes