misc: cleanup QML import modules

src/mainview/components/ParticipantOverlay.qml

src/mainview/components/ParticipantsLayer.qml

src/mainview/components/PluginHandlerItemDelegate.qml

src/mainview/components/PluginHandlerPicker.qml

src/mainview/components/ScreenRubberBand.qml

src/mainview/components/SelectScreen.qml

src/mainview/components/SidePanel.qml

src/mainview/components/SidePanelTabBar.qml

src/mainview/components/SipInputPanel.qml

src/mainview/components/UserProfile.qml

src/mainview/components/WelcomePageQrDialog.qml

src/settingsview/SettingsView.qml

src/settingsview/components/AccountProfile.qml

src/settingsview/components/AdvancedCallSettings.qml

src/settingsview/components/AdvancedChatSettings.qml

src/settingsview/components/AdvancedConnectivitySettings.qml

src/settingsview/components/AdvancedJamiSecuritySettings.qml

src/settingsview/components/AdvancedMediaSettings.qml

src/settingsview/components/AdvancedNameServerSettings.qml

src/settingsview/components/AdvancedOpenDHTSettings.qml