A faster programming grid

Programming got quicker to work in. You see more of the plan, and you'll get programs out to your athletes faster.
- Shorter rows to save vertical space, so you can see more of the program without scrolling
- Hover under a day to add an exercise with the new "+" button. This replaces the old "add exercise" button
- Adding, deleting and duplicating rows is instant now, no more waiting for the server
- The row menu moved into the drag handle on the left side of the sidebar
- Better keyboard navigation in the sidebar, so you can edit the whole row without touching your mouse
- Long macrocycle and block names no longer get cut off in the block picker


