Longkai: add popup page, options page and link to options page
Longkai: save and unsave plans.
Longkai: do some refactoring
Longkai: add delete saved plan function
Longkai: add background status refresh
Longkai: optimize the build status display logic
Longkai: organize files and add icons
Longkai: add status icon to popup page
Longkai: fix the bug: when click on saved plan, the new plan side will not be deleted
Longkai: update default icon
Longkai: choose better name for status update
Longkai: fix bug for missing http://
Longkai: refactor - import object Plan
Longkai: enable icon auto update
Longkai: add link to plans popup
Longkai: separate save plan and update plan & update link to open new tab