settingsview: homogenize ModalTextEdit usage

src/app/commoncomponents/MaterialTextField.qml

src/app/commoncomponents/ModalTextEdit.qml

src/app/commoncomponents/PasswordDialog.qml

src/app/commoncomponents/UsernameLineEdit.qml

src/app/commoncomponents/UsernameTextEdit.qml

src/app/constant/JamiStrings.qml

src/app/constant/JamiTheme.qml

src/app/mainview/components/CustomizeTipBox.qml

src/app/mainview/components/JamiIdentifier.qml

src/app/settingsview/components/AccountProfile.qml

.../settingsview/components/AdvancedConnectivitySettings.qml

.../settingsview/components/AdvancedJamiSecuritySettings.qml

...pp/settingsview/components/AdvancedNameServerSettings.qml

src/app/settingsview/components/AdvancedOpenDHTSettings.qml

...settingsview/components/AdvancedPublicAddressSettings.qml

...p/settingsview/components/AdvancedSIPSecuritySettings.qml

...app/settingsview/components/AdvancedVoiceMailSettings.qml

src/app/settingsview/components/JamiUserIdentity.qml

src/app/settingsview/components/SIPUserIdentity.qml

src/app/settingsview/components/SettingsMaterialTextEdit.qml