Merge remote-tracking branch 'upstream/master' into feature-columnautowidth
Take the sort indicator into account

- Renamed option "fitColumnsToHeader" to a more general option "minColumnWidth". Given the value "headerContent" it activates determining the minWidth of columns according to their headers content
- If a column is sorted, also add the width of the sort indicator to it's minwidth
- Converted and added Documentation
- Readded accidentally removed comment line
Merge branch 'feature-columnautowidth'