Limit the size of image uploading
Merge branch 'develop' into limit-filereader-size
rename maximumFileSize to maximumImageFileSize
Update da-DK language

- Moved da-DK video and fontstyle to ext files
- Prepared for #718 (Limit the size of image uploading) language texts
- Minor spell fix
maximumImageFileSize should be null for backward compatibility
Fix wrong option name
Pass message to custom error handler
Merge pull request #718 from HackerWins/limit-filereader-size

Limit filereader size
Merge pull request #719 from AgileLeanWorks/update_da-DK_language

Update da-DK language