UI: Edit Grammar Element: support updating composite nodes and HUMAN_TITLE fields #2391
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This change updates the Grammar Element Form to include the new properties IS_COMPOSITE, PREFIX, and VIEW_STYLE as hidden fields. This ensures that saving an element preserves these fields in the resulting SDoc file. In the future, these hidden fields will be converted into regular string/checkbox inputs that users can edit.
This change also removes a previously implemented “clever” optimization that skipped saving an element if none of its fields appeared to have changed. Over time, this check became outdated due to the introduction of new features such as HUMAN_TITLE, PROPERTIES/IS_COMPOSITE, PROPERTIES/VIEW_STYLE, and others.
Closes #2341