Fix displaying Logic Apps as Function Apps

[alexweininger]

Fixes #246

• Adds logic app icon and display name
• Won't show up in App Service or Functions resource type groups

[bwateratmsft]

This should include a resource type check, or else it would return true for everything that is not a function or logic app (e.g., true for a storage account).

Something like:

Suggested change

	return !isFunctionApp(resource) && !isLogicApp(resource);
	return resource.type.toLowerCase() === 'microsoft.web/sites' &&
	!isFunctionApp(resource) &&
	!isLogicApp(resource);

Also, doesn't need to be in this PR but it's increasingly clear we need to define our own resource type enumeration--which has separate entries for App Service, Functions, and Logic Apps--and have a single function in utils (or azureutils?) to normalize GenericResource -> that type. Then we can stop needing all these toLowerCase() and type/kind checks all over.