Misleading core installation notification on failure

### Is there an existing issue for this? - [x] This is a bug in RetroArch frontend - [x] I have searched the existing issues ### Description When you try to install a core manually but it fails to install, it shows the green checkmark even though it says in the text that it failed. This is misleading. ### Expected behavior I would expect there to instead be shown a red cross or similar signifying the failure. ### Steps to reproduce the bug 1. Try to load a shared library as a core under using either a or b a) Main Menu - Load Core - Install or Restore a Core b) Settings - Core - Manage Cores - Install or Restore a Core 2. See it fails with a green checkmark. ### Version/Commit 9c9b5f25752b3c9cdb1049378d0b96886abe80b9 ### Bisect Results _No response_ ### Present in the nightly version Yes, this is reproduced in the nightly build ### Platform & operating system Linux x86_64 ### Affected Cores _No response_ ### Environment information _No response_ ### Relevant log output ```shell ```