Fix: Taurusform does not allow to change the label
The PR #496 added a regresion in the taurusform change label feature.
Fix it by:
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In DefaultLabelWidget class:
- revert the changes in _BCK_COMPAT_TAGS
- fix getDisplayValue
-
Fix taurusValue onChangeLabelConfig method.
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Reimplement taurusLabel setText to use setPemanentText.
-
Fix displayValue to allow format strings
Fix #641 (closed)