Fix effective pom model tab on JDK 27

[mbien]

threw IAE in NbEditorDocument.createEditor()

kits are no longer injected and can't be set via Strings

meta #9523, analog to #9522

Details

java.lang.IllegalStateException: NbEditorDocument.createEditor(): ui=com.formdev.flatlaf.ui.FlatEditorPaneUI@170098d, kit=javax.swing.JEditorPane$PlainEditorKit@4ed8b283, (....)
	at org.netbeans.modules.editor.NbEditorDocument.createEditor(NbEditorDocument.java:174)
	at org.netbeans.modules.maven.grammar.EffectivePomMD$EffPOMView$5.run(EffectivePomMD.java:361)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:323)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:698)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:677)
	at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:136)
[catch] at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

[neilcsmith-net]

Makes sense.

After branch we should consider removing the existing registration hack to get uniform behaviour across supported JDKs.