Potentially duplicate FileDiolog.qml

[Armored-Dragon]

This issue is opened at the request of some users in the hub for discussion.
There are some files which look to be largely, but not entirely, duplicate qml files.

I've been doing testing on trying to see if I could replace the internal file picker and use the system's file picker. It seems like these files are used somewhere.

Maybe these could be condensed?

https://github.com/overte-org/overte/blob/9b89b3ffd9fe8bd9bd417f5a950b094aa807e577/interface/resources/qml/dialogs/FileDialog.qml

https://github.com/overte-org/overte/blob/9b89b3ffd9fe8bd9bd417f5a950b094aa807e577/interface/resources/qml/dialogs/TabletFileDialog.qml

https://github.com/overte-org/overte/blob/9b89b3ffd9fe8bd9bd417f5a950b094aa807e577/interface/resources/qml/hifi/tablet/tabletWindows/TabletFileDialog.qml

[Armored-Dragon]

This will likely be addressed with PR #886