Modify the PermissionUtils a bit to return an array of `[key, channelName]`
instead of just the keys and use it to display the channel names in the
permissions overview panel
(I could have used `QVariantMap` or `QJSonObject` here but those are
always sorted by `key`, so had to resort to using a plain vector/array)
Fixes#11584
Fixes checking for duplicate token name in a case insensitive manner
Redo the `ModelUtils.contains(model, roleName, value, mode =
Qt.CaseSensitive)` in C++; more speed and add ability to search case in/
sensitive
Some more smaller fixes/speedups
Fixes#11204
- getFileSize: NIM version would crash on non-existing or remote files
- isValidImageUrl: properly detect file extensions when the URL contains
a query (eg "file.jpeg?width=1000&height=600")
