fix missing dependency on kdeclarative and use qpa flatpak for elisa
Summary: fix missing dependency on kdeclarative and use qpa flatpak for elisa
Test Plan: elisa config dialog opens but on my setup, I am unable to open choose directory dialog.
Reviewers: Flatpak, apol
Reviewed By: Flatpak, apol
Differential Revision: https://phabricator.kde.org/D7143