Build with QT5 KF5 VCL Backend

[EliasOfWaffle]

This provide a building with qt5 KF5 VCL Backend. Can be necessary more work at top of this pull request to have the best integrations with QT DEs

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Started test build 45734

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Started test build 46391

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Started test build 46430

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Started test build 48128

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Started test build 48138

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[EliasOfWaffle]

I just think the best way to this is flathub adopt the Fedora Runtime, is not way, is necessary amount of kde dependencies to build others kde dependencies, and the problem for moving for KDE Runtime are that will be more problem in build GTK3 interface, is very necessary a Runtime that are the same of Fedora Runtime Suicide tonight

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Started test build 48450

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Started test build 48457

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Started test build 48465

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[Erick555]

There is LO using fedora runtime shipped by fedora flatpak repo among other apps. It would be pointless to duplicate it.

KDE Runtime are that will be more problem in build GTK3 interface

As I said there is no problem of building gtk3 interface in KDE runtime.

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Started test build 49540

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Build 49540 failed