Rework user can choose table view as default

[AaronDCole]

Check List

• I have read CONTRIBUTING.md and added my name as a Code Contributor.
• Contains logically grouped changes (else tidy your branch by rebase).
• Does not contain off-topic changes (use other PRs for other changes).
• Applied any dependency changes to both setup.cfg (and conda-environment.yml if present).
• Tests are included (or explain why tests are not needed).
• CHANGES.md entry included if this is a change that can affect users
• Cylc-Doc pull request opened if required at cylc/cylc-doc/pull/XXXX.
• If this is a bug fix, PR should be raised against the relevant ?.?.x branch.

[hjoliver]

@AaronDCole - this works well. However, since we proposed this, we now have the graph view as well. Is it easy to extend to 3 choices?

Default view:
- tree
- table
- graph

[MetRonnie]

Does this supersede #1128?

[MetRonnie]

Superseded by #1345