Merge branch 'master' of git://github.com/MarkUsProject/Markus
Merge branch 'master' of git://github.com/MarkUsProject/Markus
Merge branch 'master' of git://github.com/MarkUsProject/Markus
Merge branch 'master' of github.com:davidrd/Markus
Fixed issue 1405
Merge pull request #1407 from davidrd/issue-1405

Closes #1405: input and animation lag on spreadsheet