bugfix not highlighting on native ctrlF and prefilling
Closes #111: link to amo page sometimes builds incorrectly
Closes #112: no per-tab highlights with global findbar
highlightAllByDefault respect global findbar
Closes #110: don't hide FB on notifications
fix the find bar end-padding in FF28+
ESC key handler in FITFull + minor related fixes
Bump to version 1.4.18