Awesome to see sheets coming to Proton. Some things I noticed that were missing for me when using Google Sheets:

1. When using the '$' symbol, I'm noticing the cells still move if dragging or copying. Generally this symbol indicates that the cells should be static.

2. When using the "sum" feature and I add a row in the middle, the "sum" should update to include the new total number of rows.

3. The ability to "hide" a sheet that I don't want to see all the time.

4. Suggestion: for the "accounting" formatting, can we move the currency symbol to always be left aligned and the numbers to be right aligned? Google sheets does this with their formatting and I really prefer it when viewing money.