Bar line inspector consistency for span data

- Selecting a built-in span type updates other span values
- Added a check function enforcing correctness and consistency of span data (Span, From, To); it also set spin box mins and maxes to avoid meaningless values (like From below To and so on)
- Removed array of built-in span type data; span type are different enough to make a table useless: ad-hoc code is needed for most of them.
- Removed legacy, commented-out code
- Set mins for span value spins in .ui
- A few typos here and there