BaseModalDialog: redesign popups and add standard buttons

src/app/MainApplicationWindow.qml

src/app/commoncomponents/BaseModalDialog.qml

src/app/commoncomponents/ChangePttKeyPopup.qml

src/app/commoncomponents/ConfirmDialog.qml

src/app/commoncomponents/DaemonReconnectPopup.qml

src/app/commoncomponents/DeleteAccountDialog.qml

src/app/commoncomponents/EditedPopup.qml

src/app/commoncomponents/PasswordDialog.qml

src/app/commoncomponents/SimpleMessageDialog.qml

src/app/constant/JamiStrings.qml

src/app/constant/JamiTheme.qml

src/app/mainview/components/DevicesListPopup.qml

src/app/mainview/components/HostPopup.qml

src/app/mainview/components/WelcomePageQrDialog.qml

src/app/qmlregister.cpp

src/app/qmlregister.h

src/app/settingsview/components/InstallManuallyView.qml

src/app/settingsview/components/LinkedDevicesBase.qml

src/app/settingsview/components/ManageAccountPage.qml

src/app/settingsview/components/NameRegistrationDialog.qml