Merge pull request #376 from panseo/test

Insert new feature for tutoring, and upgrade color for issue
Merge pull request #377 from panseo/test

Modify left position of popover, insert new background blue e new icon f...
sync
Merge pull request #378 from gogolander/test

issue report
improved vote usability
Merge pull request #379 from gogolander/test

improved vote usability
video link restored
Merge pull request #380 from gogolander/test

video link restored
missing end fixed
Merge pull request #381 from gogolander/test

missing end fixed