Improve secondary workflows dialog

[ceesvoesenek]

Pull Request Template

Description

Several small tweaks to the secondary workflows control:

• Fix always selecting the first workflow in the list;
• Add "Task run description" field for users to fill in the description of their run, which gets passed to the backend;
• Change "t0" to "T0" for controls;
• Use the same date input as in the WebOC time selection control;
• Show workflow names instead of their descriptions or IDs;
• Disable the workflow selection if there is only one workflow;
• Show a description of the workflow if it is available;
• Use browser native time picker
• Show property description instead of ID for forms with auto-generated schemas.

Screenshots (if applicable)

Link to documentation (if applicable)

Add link to public Github pages (only documentation about configuration)

Checklist

• Make the title short and concise
• Select the correct label to include it in the release notes:
  • rel: new feature
  • rel: improvement
  • rel: fixes
  • rel: ignore
    Select to rel: ignore if this pull request fixes a New Feature or Improvement in the coming release. Update related Pull Request.
• Update documentation.
• Update tests.