feat: add `columnPickerLabel` for custom label, also fix #1605

[ghiscoding]

fixes #1605

• fixes by reverting #1476 but also make sure that it doesn't regress the older issue #1475
• also add a columnPickerLabel option in the Column interface, because in some cases the default header column extractor (defined in the global grid options) will return all text it finds (via .textContent as mentioned in this comment) and that might not be ideal given that an HTML element with extra button will also extract and append the button text in both ColumnPicker/GridMenu

TODOs

• [x] need more unit tests
• [x] need more E2E tests

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.8%. Comparing base (f03cc6c) to head (ac439dd). Report is 1 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1607 +/- ## ======================================= Coverage 99.8% 99.8% ======================================= Files 198 198 Lines 21795 21795 Branches 7303 7021 -282 ======================================= Hits 21734 21734 Misses 61 61 ```

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