Allow searching with synonyms through existing plants

[JasperSurmont]

Avoid duplicated feature requests

• There are no open or closed feature requests that are related to this request

Description

Currently you can search by synonyms through all the defined plants, but this does not work for the plants you have added.
This feature would add this functionality to the search function in your home page.

Additionally, this feature request could be made to make synonyms more clear: the formatting is sometimes wrong and the functionality sometimes doesn't work (I also feel like it only works when separated with comma's).