[Fix] PluginCypht: Fix theme issue when selecting a folder
Description
Corrected the visual when selecting folders in Tiki Webmail when we use (embed) the Plugin Cypht in a Wiki page.
You can see how the situation looked like before modification.
Steps to test
To test, use the CyphtPlugin in a Wiki page and configure it beforehand.
Expected result
After modification, the expected result is like on this capture.