Follow-up from "Copy and merge the existing license management docs to a new location"

The following discussions from !10732 (merged) should be addressed:

@eread started a discussion:
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#### Installing custom dependencies
```
Could we shorten for the same of the ToC? Do we lose any meaning?

> Introduced in [GitLab Ultimate](https://about.gitlab.com/pricing/) 11.4.

@eread started a discussion:
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#### Overriding the template
```
In the context of the level three section, I think this is ok.
@eread started a discussion:
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#### Configuring Maven projects
```
@eread started a discussion:

The note is longer than the rest of the topic.

Either de-note, or find a way to pull a single sentence out of the text for a note.

Edited Apr 11, 2019 by Achilleas Pipinellis