Newly defined flag annotation columns is hidden and cannot be shown

[dennisrd]

Found this issue in f432b0b.

Using example data file vacation.csv

The following scenario demonstrates the issue:

• Open the file in Tracy (using the standard CSV converter)
• Create a flag annotation column
  • the Type does not seem to matter, e.g. choose a User Defined column, leave the Name "FlagRule1" (no Description, no Default Value),
  • with a single flag with Name "Flag1",
  • and the following condition (for Flag1): column Action contains text: vacation
  • then close the pop-up

Now the newly defined column is hidden. Selecting (unhiding) it in the "Choose Columns" menu is not possible (after closing the "Choose Columns" menu, it is hidden again).

[dennisrd]

PS. An additional (minor) issue is that in the Edit Flag Annotation Column pop-up, the value for Name cannot be cleared: when trying to clear the last remaining character, the value "FlagRule1" re-appears.