Added flag for action bar back button. Added back button for actionmode

OsmAnd/res/values/styles.xml

@@ -78,6 +78,8 @@
         <item name="actionModeBackground">@color/actionbar_light_color</item>
         <item name="actionBarStyle">@style/Widget.Styled.ActionBarLight</item>
         <item name="android:actionBarStyle">@style/Widget.Styled.ActionBarLight</item>
+		<item name="android:actionModeCloseDrawable">@drawable/action_mode_back</item>
+		<item name="actionModeCloseDrawable">@drawable/action_mode_back</item>
     </style>
 
     <style name="OsmandDarkTheme" parent="Theme.AppCompat">
@@ -94,6 +96,8 @@
         <item name="actionModeBackground">@color/actionbar_dark_color</item>
         <item name="actionBarStyle">@style/Widget.Styled.ActionBarDark</item>
         <item name="android:actionBarStyle">@style/Widget.Styled.ActionBarDark</item>
+		<item name="android:actionModeCloseDrawable">@drawable/action_mode_back</item>
+		<item name="actionModeCloseDrawable">@drawable/action_mode_back</item>
     </style>
 
     <style name="OsmandLightDarkActionBarTheme" parent="Theme.AppCompat.Light.DarkActionBar">

OsmAnd/src/net/osmand/plus/activities/MainMenuActivity.java

@@ -144,6 +144,7 @@ public class MainMenuActivity extends BaseDownloadActivity implements OsmAndLoca
 	protected void onCreate(Bundle savedInstanceState) {
 		getMyApplication().applyTheme(this);
 		super.onCreate(savedInstanceState);
+		haveHomeButton = false;
 		if (getIntent() != null) {
 			Intent intent = getIntent();
 			if (intent.getExtras() != null && intent.getExtras().containsKey(APP_EXIT_KEY)) {

OsmAnd/src/net/osmand/plus/activities/OsmandActionBarActivity.java

@@ -13,6 +13,8 @@ import net.osmand.plus.R;
  */
 public class OsmandActionBarActivity extends ActionBarActivity {
 
+	protected boolean haveHomeButton = true;
+
     //should be called after set content view
     protected void setupHomeButton(){
         Drawable back = getResources().getDrawable(R.drawable.abc_ic_ab_back_mtrl_am_alpha);
@@ -25,18 +27,24 @@ public class OsmandActionBarActivity extends ActionBarActivity {
     @Override
     public void setContentView(int layoutResID) {
         super.setContentView(layoutResID);
+		if (haveHomeButton) {
 			setupHomeButton();
 		}
+    }
 
     @Override
     public void setContentView(View view) {
         super.setContentView(view);
+		if (haveHomeButton) {
 			setupHomeButton();
 		}
+    }
 
     @Override
     public void setContentView(View view, ViewGroup.LayoutParams params) {
         super.setContentView(view, params);
+		if (haveHomeButton) {
 			setupHomeButton();
 		}
     }
+}