GH-1342: mark property completion list as incomplete to re-trigger co…

…mpletion processing

headless-services/spring-boot-language-server/src/main/java/org/springframework/ide/vscode/boot/properties/completions/SpringPropertiesCompletionEngine.java

@@ -59,7 +59,7 @@ public InternalCompletionList getCompletions(TextDocument doc, int offset) throw
 		Collection<ICompletionProposal> completionItems = new PropertiesCompletionProposalsCalculator(indexProvider.getIndex(doc).getProperties(),
 				typeUtilProvider.getTypeUtil(sourceLinks, doc), completionFactory, doc, offset, preferLowerCaseEnums).calculate();
 
-		return new InternalCompletionList(completionItems, false);
+		return new InternalCompletionList(completionItems, true);
 	}
 
 	public boolean getPreferLowerCaseEnums() {