wrong sort order - schema:identifier of type^^xsd:integer

[Rdataflow]

Describe the bug
The sort order found in filter (a - filter list, b - drop down, c - metadata panel) is wrongly ordered by schema:identifier interpreted as xsd:string - while in LINDAS it has type xsd:integer. NB: Meanwhile the legend (preview & published) is fine 👍

To Reproduce
a) Steps to reproduce the behavior:

1. Go to https://int.visualize.admin.ch/create/new?cube=https://environment.ld.admin.ch/foen/gefahren-waldbrand-warnung/1
2. Click on Color > Canton
3. Scroll down to selected filters / or edit filters
4. See wrong sort order applied ("1":Zurich, "10":Fribourg, "11":Solothurn, ...)

b) Steps to reproduce the behavior:

1. Go to https://int.visualize.admin.ch/create/new?cube=https://environment.ld.admin.ch/foen/gefahren-waldbrand-warnung/1
2. Click on add filter > Canton
3. Open DropDown List
4. See wrong sort order ("1":Zurich, "10":Fribourg, "11":Solothurn, ...)
   

c) Steps to reproduce the behavior:

1. Go to https://int.visualize.admin.ch/create/new?cube=https://environment.ld.admin.ch/foen/gefahren-waldbrand-warnung/1
2. Click on Metadata > Data
3. Open Canton
4. See wrong sort order ("1":Zurich, "10":Fribourg, "11":Solothurn, ...)
   

Expected behavior
Identifier parsed according to the data in lindas as xsd:integer and thus ordered (1:Zurich, 2:Berne, 3:Lucerne ...)
xref: #937 (comment)

Environment (please complete the following information):

• Visualize environment and version: [e.g. INT v3.19.5]

Additional information
required for the upcoming go live of forest fire warning.

[ptbrowne]

@Rdataflow Has this dataset changed ? I remember solving the integer interpretation bug, but now I cannot re-check since I cannot use a column chart due to the lack of number measure.