misc: string refactoring

qml.qrc

src/commoncomponents/AccountMigrationDialog.qml

src/commoncomponents/DeleteAccountDialog.qml

src/commoncomponents/JamiFileDialog.qml

src/commoncomponents/PasswordDialog.qml

src/commoncomponents/PhotoboothView.qml

src/commoncomponents/PreferenceItemDelegate.qml

src/constant/JamiStrings.qml

src/constant/JamiTheme.qml

src/mainview/components/AboutPopUp.qml

src/mainview/components/AccountComboBox.qml

src/mainview/components/CallOverlayButtonGroup.qml

src/mainview/components/CallViewContextMenu.qml

src/mainview/components/ContactSearchBar.qml

src/mainview/components/ParticipantContextMenu.qml

src/mainview/components/SelectScreen.qml

src/mainview/components/SidePanel.qml

src/mainview/components/SidePanelTabBar.qml

src/mainview/components/UserProfile.qml

src/mainview/components/WelcomePage.qml