Feat: rework inventory page
Inventory page takes ages to load for gardens with a lot of elements/patch and history. This MR
- splits the page in sub pages
- makes tabs for tasks, observations, harvests and activities so they are filtered by element/patch
- makes the view mobile-friendly (there are still a few elements overflowing or too small, as modals)
- groups removed elements by year
It closes #163 (closed)
Edited by Manuel Tancoigne