Morecast 2.0: Cells wiped with edit after model application, multiple stations

[conbrad]

Actual Behaviour

When forecasting for multiple stations for a weather parameter, applying a model to the date range and clicking to fill some cells, then manually editing a cell will wipe or reapply an old value.

Steps To Reproduce

1. Select a date range and 2 stations for a weather parameter
2. Select and apply a model to all dates that doesn't apply to all dates (e.g. hrdps)
3. For empty cells, click cells from another model to fill them
4. Go back and manually edit one of the model filled cells
5. See that some cells get wiped or old values applied

Screenshots

If applicable, add screenshots to help explain your problem.

Expected Behaviour

Manually editing a cell will only adjust that cell, regardless of state of cell or other cells.