Bug 72285 [KeyBindings] registry: Cannot assign keybinding to general views
It seems the views have to do something special to show up on the "Views" keybinding list. It would be nice if all views showed up automatically. Of course then (or even now) there would be so many views that the current level of grouping is not sufficient.
bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/Command.java
*            <code>null</code>.
	 */
	private final void fireCommandChanged(final CommandEvent commandEvent) {
		if (commandEvent == null)
			throw new NullPointerException();
		if (commandListeners != null) {
			final Iterator listenerItr = commandListeners.iterator();
			while (listenerItr.hasNext()) {
				final ICommandListener listener = (ICommandListener) listenerItr
						.next();
				listener.commandChanged(commandEvent);
			}
		}
	}
	/**
	 * Returns the category for this command.
	 * 
	 * @return The category for this command; never <code>null</code>.
	 * @throws NotDefinedException
	 *             If the handle is not currently defined.
	 */
	public final Category getCategory() throws NotDefinedException {
		if (!isDefined()) {
			throw new NotDefinedException(
					"Cannot get the category from an undefined command"); 
		}
		return category;
	}
	/**
	 * Returns whether this command has a handler, and whether this handler is