Menus and submenus need enable property

[smalers]

The latest push has enabled property on submenus. However, I did not have in my app-config.json file. The behavior in this case was that no submenus showed. Also, setting to false does not seem to work. The behavior should be as follows:

• enabled should default to true if not in the config file
• the property should be a boolean rather than a string if possible
• a value of false should still display the menu but it should be grayed out - this will allow new features to be laid out for demonstration purpose and functionality filled in
• to not show a menu, a property visible should be added with default true and false will not display the menu item at all - this is lower priority

[Nightsphere]

I just pushed for this issue. The enabled property has now been implemented so that it doesn't
need to be included, and defaults to true. Only saying enabled: "false" will gray out the
button and nothing will happen when clicked.

visible has also been implemented. Default is all menus will be visible, unless visible: "false"
is added to the menu in the config file. I would close this but first wanted to check about the use
of the true and false values as strings and not booleans. I was used to having to deal with
properties as strings because that's how the GeoProcessor created them, but since the
app-config file isn't, then it's okay to make them booleans instead?

If so, it'll take 5 minutes to update this and I'll do a new push and close the issue.

[Nightsphere]

After talking with Steve, a new implementation has been added for having the enabled property be set
as a boolean or a string. Either will work. Closing this issue.

[smalers]

The disabled menus need to have their appearance changed. The graying of the background makes it look like the menu is actually selected. A disabled menu should have the same background as normal, but the text should be greyed out, similar to the following from TSTool. The following also shows menu separators, which I mentioned in another issue.

[Nightsphere]

New changes were made and pushed. As of now the menus are appearing the correct way whether
visible and/or enabled. Closing the issue.