unset categories can't be returned by analyse

[josiemundi]

Describe the bug
When there is already a category 'unset' string that is the same or contains any character within another string, the analyse endpoint will not color by category.

To Reproduce
Steps to reproduce the behavior:

1. In the highlighter, select just the letter "p" and leave it uncategorised.
2. Highlight another word that has "p" within it (e.g "leap") and categorize it.
3. Go to 'TakeTwo web api' text creator page and type in the second word you highlighted ("leap").
4. See that the category color does not show.

Expected behavior
Should highlight all matches, for example both "p" and "pappa".

Additional context
We can fix this by filtering out the "unset" categories when using the analyse endpoint. TO DO.

[github-actions]

👋 Hi! This issue has been marked stale due to inactivity. If no further activity occurs, it will automatically be closed in 14 days.

[github-actions]

👋 Hi! This issue has been marked stale due to inactivity. If no further activity occurs, it will automatically be closed in 14 days.

[github-actions]

👋 Hi! This issue has been marked stale due to inactivity. If no further activity occurs, it will automatically be closed in 14 days.

[github-actions]

👋 Hi! This issue has been marked stale due to inactivity. If no further activity occurs, it will automatically be closed in 14 days.