Refactor: use inline edit form's `inEditModeProperty` to show/hide "Add Tree" button
UI to support resolving alerts

* Collection UDF tables get an extra final column for buttons (e.g. "+" and "Resolve")
* When entering "Edit" mode on plot detail page, add "Resolve" buttons on unresolved "Alerts" rows
Merge pull request #1280 from RickMohr/add-alerts-udf

Plot detail: UI to support resolving alerts