MOBILE-587 Prevent default event handler for course sections in the menu
MOBILE-549 Grades plugin

Initial version without retrieving the grades
MOBILE-585 Error when using emulator
MOBILE-549 Grades plugin: Plugin visibility detection
MOBILE-549 Grades plugin: Adding loading information
MOBILE-593 Notifications: Loading icon not working as expected
Update zh_tw.json

Modified some errors,there are redundant double quotes in string "enablenotificationscheck"
Merge pull request #84 from go38/patch-1

Update zh_tw.json
MOBILE-548: Style for user grades for tablets and phones.
MOBILE-586: Common elements placed above all specific styling
MOBILE-586: Navigation related selectors placed in the navigation module
MOBILE-586: Obsolete button related selectors deleted and centered selector placed in the button module
MOBILE-586: Media objects nested
MOBILE-586: Loading objects placed in a group
MOBILE-586: Add-site and Manage-accounts placed in the Opening screen block
MOBILE-586: Header-main nested, related selectors placed in the header block, obsolete selectors deleted
MOBILE-586: Selectors common on three panels placed in a block
MOBILE-586: User menu sorted and nested plus related selectors placed in the user menu block
MOBILE-586: Welcome placed in a block
MOBILE-586: Course page nested and related selectors placed in the course page block plus few selectors used on the right panel