Spreadsheet: shortcuts to copy content vertically/horizontally

Imported from UserVoice

Author: j

Both Excel and LibreOffice have a very convenient shortcut: Ctrl+D. When multiple cells are selected vertically, it copies the contents of the top cell to the others below. There is also Ctrl+R, which copies the content from the leftmost selected cell to the rightmost selected cell when cells are selected horizontally.

These shortcuts can significantly boost productivity in many scenarios. I really miss this feature in OnlyOffice.