Adds the ability to copy the contents of column headers.
Features
- Added the ability to copy the contents of column headers by using 3 new context menu options: 'Copy with headers', 'Copy with group headers', and 'Copy headers only'.
- Added 4 new API methods for copying column headers programmatically: 'copyCellsOnly()', 'copyWithColumnHeaders()', 'copyWithAllColumnHeaders()', and 'copyColumnHeadersOnly()'.
- Added translations for the new context menu options in:
- Arabic.
- Czech.
- English.
- Spanish.
- Italian.
- Latvian.
- Norwegian.
- Dutch.
- Polish.
- Added missing TypeScript definitions of 'CellCoords' and 'CellRange' classes, which are used in the arguments of some APIs.
- Added missing TypeScript definitions for the following Handsontable hooks: 'beforeColumnFreeze', 'afterColumnFreeze', 'beforeColumnUnfreeze', and 'afterColumnUnfreeze'.