Text corrections on non-default textclasses fail

[proycon]

Text corrections on non-default textclasses fails because they introduce a new element (new text content), which subsequently does not inherit the right non-default text class but gets assigned the default one (current).

(This applies to joins, split and insertions, as well as individual tokens)

Discovered while debugging #170

[proycon]

This seems fixed in my latest development tests now.

[proycon]

This now fails again, probably the fix I implemented for this issue leads to related problems elsewhere.
Correcting a text in the OCR textclass yields the following:

Editor submission failed: FoLiA Document Server error: FoLiA error in proycon/FA-b1_3_1_mwtext_vorbemerk_pp61_67_001: [ValueError] Textclass is not supported for TextContent

Query was: PROCESSOR name "proycon" type manual IN PROCESSOR name "FLAT" version "1.0" host "127.0.0.1:8000" src "http://127.0.0.1:8000/" IN PROCESSOR name "foliadocserve" version "0.7.5" host "mhysa.anaproy.nl" folia_version "2.5.0" src "https://github.com/proycon/foliadocserve" EDIT t OF https://raw.githubusercontent.com/proycon/folia/master/setdefinitions/text.foliaset.ttl WITH text "preussischen" textclass "OCR" datetime now confidence NONE (AS CORRECTION OF adhoc WITH class "test" datetime now confidence NONE) FOR ID FA-b1_3_1_mwtext_vorbemerk_pp61_67_001.text.div1.p4.s.2.w.9 FORMAT flat RETURN target

The same was also reported by @pirolen in #170 :

Editor submission failed: FoLiA Document Server error: FoLiA error in pirolen/FA-mittelalt_bibkat_sample_001: [ValueError] Textclass is not supported for TextContent

Query was: PROCESSOR name "pirolen" type manual IN PROCESSOR name "FLAT" version "1.0" host "138.246.225.16:8000" src "http://138.246.225.16:8000/" IN PROCESSOR name "foliadocserve" version "0.7.6" host "badwver-itservice2.srv.mwn.de" folia_version "2.5.0" src "https://github.com/proycon/foliadocserve" EDIT t OF https://raw.githubusercontent.com/proycon/folia/master/setdefinitions/text.foliaset.ttl WITH text "Summ" textclass "ocr" datetime now confidence NONE (AS CORRECTION OF https://raw.githubusercontent.com/pirolen/folia-resources/main/bibkat_ocr_corrections.foliaset.xml WITH class "other" datetime now confidence NONE) FOR ID FA-mittelalt_bibkat_sample_001.text.div.1.entry.1.term.1.s.1.w.1 FORMAT flat RETURN target

[proycon]

Ok, this seems to fix it now