Unmapped components silently do nothing

**Describe the bug**
If MapTo is not done between a component and a cqType, the Container component will not render it and no logging will be produced.

**Package version**
1.1.10

**To Reproduce**
Steps to reproduce the behavior:
1. Create some custom component
2. Forget to MapTo between that component and the cqType or make a typo on it
3. Include that component in a container

**Expected behavior**
The component is not rendered and the developer gets some visual clue or a log line about what just happened, allowing the developer to suspect of only one or two probable causes.

**Actual behavior**
The component is not rendered and the developer gets no visual clue nor a log line about what just happened, leaving the developer wondering about a wide variety of possible causes.

Start by reproducing the issue with a custom component that is not mapped with MapTo, then trace how the Container handles the unmapped component. Done means the component remains unrendered but provides a visual clue or log line that helps identify the missing or incorrect mapping.

Written by the indexing model from the issue text.