isolation mode for spreadsheet to only show certain columns

have a list of available attributes in the spreadsheets n panel. One or multiple can be selected, and then if the user presses forward slash over the spreadsheet, only those are shown. Makes it easier to find the attributes interested in.

Having them in the n panel would be better than clicking their column headers in the spreasheet, because it requires less scrolling.

This would also make it easier to compare two attributes that aren't right next to each other.