Resizing Columns not working or strange

The fixed size of the status column is intentional - the column only contains icons that all have the same size, so there is no need to change its size.

The strange behavior when trying to resize the column is a side effect of how we block resizing. JavaFX doesn't provide a way to completely disable column resizing, so instead we set the column's minimum and maximum size to the same value. This prevents the column size from changing, but apparently confuses the JavaFX column resizing algorithm (which causes the sizes of other columns to change).