feat(mobile/navigation): disabled bottom tab navigator backBehavior (#12320)

* feat(mobile/navigation): disabled backBehavior in bottom tab navigator

react/features/mobile/navigation/components/welcome/components/WelcomePageTabs.js

@@ -68,7 +68,7 @@ const WelcomePageTabs = ({ disabled, onListContainerPress, onSettingsScreenFocus
 
     return (
         <WelcomePage.Navigator
-            initialRouteName = { screen.welcome.tabs.recent }
+            backBehavior = { 'none' }
             screenOptions = {{
                 ...tabBarOptions,
                 headerShown: false

react/features/settings/components/native/SettingsView.tsx

@@ -161,11 +161,6 @@ interface Props extends WithTranslation {
      * Default prop for navigating between screen components(React Navigation).
      */
     navigation: Object;
-
-    /**
-     * Callback to be invoked when settings screen is focused.
-     */
-    onSettingsScreenFocused: Function;
 }
 
 /**

react/features/welcome/components/WelcomePage.native.js

@@ -10,7 +10,6 @@ import {
 } from 'react-native';
 
 import { getName } from '../../app/functions';
-import { ColorSchemeRegistry } from '../../base/color-scheme';
 import { translate } from '../../base/i18n';
 import { Icon, IconWarning } from '../../base/icons';
 import JitsiStatusBar from '../../base/modal/components/JitsiStatusBar';
@@ -30,11 +29,6 @@ import styles, { PLACEHOLDER_TEXT_COLOR } from './styles';
 
 type Props = AbstractProps & {
 
-    /**
-     * The color schemed style of the Header component.
-     */
-    _headerStyles: Object,
-
     /**
      * Default prop for navigating between screen components(React Navigation).
      */
@@ -425,8 +419,7 @@ class WelcomePage extends AbstractWelcomePage<*> {
  */
 function _mapStateToProps(state) {
     return {
-        ..._abstractMapStateToProps(state),
-        _headerStyles: ColorSchemeRegistry.get(state, 'Header')
+        ..._abstractMapStateToProps(state)
 
         // _reducedUI: state['features/base/responsive-ui'].reducedUI
     };