Refine the layout

src/main/res/layout/layout_profiles_item.xml

@@ -44,7 +44,7 @@
         <LinearLayout android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_marginStart="8dp"
-            android:layout_marginTop="8dp"
+            android:layout_marginTop="4dp"
             android:id="@+id/details">
             <TextView android:id="@+id/address"
                 android:layout_width="match_parent"
@@ -54,7 +54,7 @@
                 android:layout_weight="1"
                 android:maxLines="1"
                 android:ellipsize="end"
-                android:textAppearance="?android:attr/textAppearanceMedium"
+                android:textAppearance="?android:attr/textAppearanceSmall"
                 android:textColor="?android:attr/textColorSecondary"/>
             <TextView android:id="@+id/traffic"
                 android:layout_width="match_parent"
@@ -64,7 +64,7 @@
                 android:layout_weight="1"
                 android:maxLines="1"
                 android:ellipsize="end"
-                android:textAppearance="?android:attr/textAppearanceMedium"
+                android:textAppearance="?android:attr/textAppearanceSmall"
                 android:textColor="?android:attr/textColorSecondary"/>
         </LinearLayout>
     </LinearLayout>

src/main/scala/com/github/shadowsocks/GlobalConfigFragment.scala

@@ -66,4 +66,5 @@ class GlobalConfigFragment extends PreferenceFragment {
       progressDialog = null
     }
   }
+
 }

src/main/scala/com/github/shadowsocks/MainActivity.scala

@@ -335,7 +335,11 @@ class MainActivity extends Activity with ServiceBoundContext with Drawer.OnDrawe
   }
 
   private def displayFragment(fragment: ToolbarFragment) {
-    getFragmentManager.beginTransaction().replace(R.id.content, fragment).commitAllowingStateLoss()
+    val transaction = getFragmentManager.beginTransaction().replace(R.id.content, fragment)
+    if (fragment != profilesFragment)
+      transaction.addToBackStack(null).commitAllowingStateLoss()
+    else
+      transaction.commitAllowingStateLoss()
     drawer.closeDrawer()
   }