add manage accounts to preference screen

res/xml/preferences.xml

@@ -7,7 +7,8 @@
         android:title="@string/prefs_select_oc_account"
         android:summary="@string/prefs_summary_select_oc_account" 
         />
-    <CheckBoxPreference android:key="instant_uploading" android:title="Enable instant uploading" android:summary="Instantly upload photos taken by camera"/>
+    <Preference android:title="Manage accounts" android:key="manage_account" /><CheckBoxPreference android:key="instant_uploading" android:title="Enable instant uploading" android:summary="Instantly upload photos taken by camera"/>
+    
 	</PreferenceCategory>
     
 

src/eu/alefzero/owncloud/ui/activity/Preferences.java

@@ -27,6 +27,7 @@ import android.preference.CheckBoxPreference;
 import android.preference.ListPreference;
 import android.preference.Preference;
 import android.preference.Preference.OnPreferenceChangeListener;
+import android.preference.Preference.OnPreferenceClickListener;
 import android.util.Log;
 import android.view.ContextMenu;
 import android.view.ContextMenu.ContextMenuInfo;
@@ -74,6 +75,16 @@ public class Preferences extends SherlockPreferenceActivity implements
         populateAccountList();
         ActionBar actionBar = getSherlock().getActionBar();
         actionBar.setDisplayHomeAsUpEnabled(true);
+        Preference p = findPreference("manage_account");
+        if (p != null)
+        p.setOnPreferenceClickListener(new OnPreferenceClickListener() {
+            @Override
+            public boolean onPreferenceClick(Preference preference) {
+                Intent i = new Intent(getApplicationContext(), AccountSelectActivity.class);
+                startActivity(i);
+                return true;
+            }
+        });
     }
 
     /**