Calc: limit scrollbar to data area

[eszkadev]

When we moved our view to the end of spreadsheet - scrollbar works with large range. This PR will reduce the range again to small value (only area containing data) when we enter again data area.

Requires core changes: https://gerrit.libreoffice.org/c/core/+/139471 https://gerrit.libreoffice.org/c/core/+/139472 https://gerrit.libreoffice.org/c/core/+/139473

[eszkadev]

To test: 1 open spreadsheet 2 go to last row: ctrl + arrow down 3 move scrollbar to lets say 1/3 of its range and type some data

result: we have 2 scrolbar modes, above data we limit scrollbar to the last used row/column. when we reach the end of data - we unlock it and allow to scroll far away.

[pedropintosilva]

Tested, it feels great. Thanks!