Update search list after a file has been deleted

[j-ed]

Actual behavior

If you enter a keyword and execute a search, the result is displayed on the screen. If you now select a file and delete it, the displayed file list isn't updated and the already deleted 'ghost' file is still displayed.

Expected behavior

If you select to delete file which has previously found using the search function, the list of displayed files should instantely been updated.

Steps to reproduce

1. Open the Nextcloud app and use the search function to find matching files.
2. Select one of the displayed files and delete it.
   -> The deleted file will still be displayed although it doesn't exist anymore.

Environment data

Android version: 11.0
Device model: Samsung Galaxy S20
Stock or customized system: Stock ROM
Nextcloud app version: 3.16.0 RC2
Nextcloud server version: 20.0.9

[joshtrichards]

No longer applicable with Unified Search added in #7568