SettingsView: apply the new design

resources/icons/Key_Black_24dp.svg

src/app/appsettingsmanager.cpp

src/app/appsettingsmanager.h

src/app/bannedlistmodel.cpp

src/app/bannedlistmodel.h

src/app/commoncomponents/ConfirmDialog.qml

src/app/commoncomponents/ContactMessageDelegate.qml

src/app/commoncomponents/DeleteAccountDialog.qml

src/app/commoncomponents/JamiIdentifier.qml

src/app/commoncomponents/MaterialButton.qml

src/app/commoncomponents/MaterialRadioButton.qml

src/app/commoncomponents/MaterialTextField.qml

src/app/commoncomponents/PasswordTextEdit.qml

src/app/commoncomponents/PreferenceItemDelegate.qml

src/app/commoncomponents/PushButton.qml

src/app/commoncomponents/SettingParaCombobox.qml

src/app/commoncomponents/SimpleMessageDialog.qml

src/app/constant/JamiStrings.qml

src/app/constant/JamiTheme.qml

src/app/currentaccount.cpp