Support choosing .ico files in custom icon file chooser
Summary:
.ico files work fine, so we should allow them to be chosen in the custom icon file chooser dialog.
BUG: 233201
FIXED-IN: 5.48
Test Plan:
- Find a .ico file lying around, or turn a .png file into a .ico file using https://convertico.com/
- Typ to apply it to a folder in Dolphin
- You can select the .ico file in the dialog, and when applied, it appears correctly as a custom icon for the folder
Reviewers: Frameworks, cfeck
Reviewed By: cfeck
Subscribers: broulik, kde-frameworks-devel
Tags: Frameworks
Differential Revision: https://phabricator.kde.org/D13718