@Override
	public void actionPerformed(DomainFileContext context) {
		showHistory(context.getSelectedFiles());
	}
Creates an action to show the version history for a single version controlled 
domain file in the repository.
@param plugin the plug-in that owns this action.
Ghidra/Framework/Project/src/main/java/ghidra/framework/main/projectdata/actions/VersionControlShowHistoryAction.java