v0.2.1

• A merged cell keeps its fill: the white that hides the gridlines inside a merged area was painted over its fill, so a white title on a coloured merged row could not be seen.
• A workbook whose A1 is merged opens with the whole merged area selected, as in Excel.
• The icon turns indigo, with a cyan selection.

Full Changelog: v0.2.0...v0.2.1