[Feature] Pin columns/rows

[dima-jabali]

Initial checklist

• Is this really a problem?
• I have searched the Github Issues for similar issues, but did not find anything.

Problem

Like in tables, it would be interesting to have the ability to pin columns and rows. 'Freeze' doesn't fulfill this, as it seems to keep all columns to the left in place, instead of a single one (it also essentially hides the previous rows for some reason).