fixed recreation issues in StartConversationActivity

src/main/AndroidManifest.xml

@@ -51,7 +51,6 @@
         </activity>
         <activity
             android:name=".ui.StartConversationActivity"
-            android:configChanges="orientation|screenSize"
             android:label="@string/title_activity_start_conversation"
             android:launchMode="singleTask">
             <intent-filter>

src/main/java/eu/siacs/conversations/ui/EnterJidDialog.java

@@ -1,6 +1,7 @@
 package eu.siacs.conversations.ui;
 
 import android.app.AlertDialog;
+import android.app.Dialog;
 import android.content.Context;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -120,8 +121,9 @@ public class EnterJidDialog {
 		this.listener = listener;
 	}
 
-	public void show() {
+	public Dialog show() {
 		this.dialog.show();
 		this.dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener(this.dialogOnClick);
+		return this.dialog;
 	}
 }