[WEB-515] fix: spreadsheet layout overflow

[anmolsinghbhatia]

Problem:

1. Properties dropdown in all layouts overflow the header.
2. Spreadsheet column sort by dropdown overlaps with the app header.
3. Spreadsheet title column header does not stick to the top.

Solution:

1. Resolved a z-indexing problem causing the overflow and conducted testing to ensure resolution wherever applicable.
2. Implemented necessary modifications to the spreadsheet layout to resolve the dropdown overlap with the app header.
3. Implemented necessary changes to the spreadsheet header component to address the issue of the title column header not sticking to the top.

Issue link: [WEB-515]