Enable/disable student's "My questions" panel via global config
Fixed Travis CI build
Start next release cycle
Revert "Revert "Grid question shall be called a Picture question (Pic)""

This reverts commit ecfcf8936dc99614ce268035b12af90fc48cc87a.
Revert "Grid question shall be called a Picture question (Pic)"

The commit is reverted temporarily to exclude the change from 2.0
release.

This reverts commit ada66d008cab85764da5a18bd73b367ea70f3728.
Wording changes
Update POM
Proper view title for picture questions
Show no title for students' questions panel
Wording changes

Conflicts:
	src/main/webapp/app/internationalization.js
Fix Maven Sonar configuration
Merge branch '2.0'
Fix test for WebSocket support

This fixes a regression introduced by ab94539.
Fix SCM URL in POM
Merge branch '2.0'
Release version 2.0.0
Start next patch release cycle
Fixed #11987: Show ask button on "my questions" panel
Fixed #11989: Hide statistics button for flashcards
Fixed #11991: Show category instead of question type in carousels