Dataframe view: deduplicate row with identical value

[abey79]

The dataframe view has a lot of duplicated content, especially in time range mode (same entity for many timestamps, etc.).

• deduplicate content of the time and/or entity path columns (ie. write the content only once
• add stroke lines to make cell "merged" state more explicit
• "stick" the cell value to the top of the table when scrolling

[gavrelina]

if we start with an entity on top -> most likely this behavior will not happen as often (only if smth was logged at the same time tick multiple times, which is not a majority of cases). Because normally there will be 1 row per a time tick. Hence this will be useful after enabling changing 'Entity as a row' VS 'Entity as a column'?

Screen.Recording.2024-08-29.at.19.18.25.mov

[abey79]

Probably only useful with:

• Add support for having entity path as rows #7379