feature: save participant's view

src/app/appsettingsmanager.h

src/app/calladapter.cpp

src/app/calladapter.h

src/app/commoncomponents/contextmenu/GeneralMenuItem.qml

src/app/constant/JamiStrings.qml

src/app/constant/JamiTheme.qml

src/app/mainapplication.cpp

src/app/mainview/components/CallOverlay.qml

src/app/mainview/components/CallViewContextMenu.qml

src/app/mainview/components/KeyboardShortcutKeyDelegate.qml

src/app/mainview/components/KeyboardShortcutTable.qml

src/app/mainview/components/OngoingCallPage.qml

src/app/mainview/components/ParticipantOverlay.qml

src/app/mainview/components/ParticipantsLayer.qml

src/app/mainview/components/Toast.qml

src/app/mainview/components/ToastManager.qml

src/app/settingsview/components/RecordingSettings.qml

src/app/utilsadapter.cpp

src/app/utilsadapter.h

src/app/videoprovider.cpp