---Preview Feature---
Microsoft have finally released a really convenient tool that should have been available a while back...
Search Pane
Search Pane now enables App Makers to search through code, variables, collections and so much more now within an App. This offers incredible efficiency when searching for something specific that is not a control name.
The Search Pane is currently located under 'Upcoming Features' under the 'Preview' tab. All you need to do is enable it.
In addition to now being able to search, users can also apply search filters and matching criteria's. The Search Pane is however limited to returning a maximum of 2000 results.
To learn more, check out the Microsoft documentation here