Fix an issue with cancelling bottom sheet

Signed-off-by: Mario Danic <mario@lovelyhq.com>

app/src/main/java/com/nextcloud/talk/controllers/ContactsController.java

@@ -22,6 +22,7 @@ package com.nextcloud.talk.controllers;
 
 import android.app.SearchManager;
 import android.content.Context;
+import android.content.DialogInterface;
 import android.content.Intent;
 import android.os.Bundle;
 import android.os.Handler;
@@ -807,14 +808,16 @@ public class ContactsController extends BaseController implements SearchView.OnQ
                     RouterTransaction.with(new OperationsMenuController(bundle))
                             .popChangeHandler(new VerticalChangeHandler())
                             .pushChangeHandler(new VerticalChangeHandler()));
+
+            bottomSheet.setOnShowListener(dialog -> eventBus.post(new BottomSheetLockEvent(false, 0,
+                    false, false)));
         }
 
         if (bottomSheet == null) {
             bottomSheet = new BottomSheet.Builder(getActivity()).setView(view).create();
         }
 
-        bottomSheet.setOnShowListener(dialog -> eventBus.post(new BottomSheetLockEvent(false, 0,
-                false, false)));
+        bottomSheet.setOnDismissListener(dialog -> getActionBar().setDisplayHomeAsUpEnabled(getRouter().getBackstackSize() > 1));
 
         bottomSheet.show();
     }

app/src/main/java/com/nextcloud/talk/controllers/ConversationsListController.java

@@ -535,6 +535,7 @@ public class ConversationsListController extends BaseController implements Searc
         }
 
         bottomSheet.setOnShowListener(dialog -> new KeyboardUtils(getActivity(), bottomSheet.getLayout(), true));
+        bottomSheet.setOnDismissListener(dialog -> getActionBar().setDisplayHomeAsUpEnabled(getRouter().getBackstackSize() > 1));
         bottomSheet.show();
     }
 

app/src/main/java/com/nextcloud/talk/controllers/base/BaseController.java

@@ -104,7 +104,7 @@ public abstract class BaseController extends ButterKnifeController {
     protected void onAttach(@NonNull View view) {
         setTitle();
         if (getActionBar() != null) {
-            getActionBar().setDisplayHomeAsUpEnabled(getRouter().getBackstackSize() > 1);
+            getActionBar().setDisplayHomeAsUpEnabled(getParentController() != null || getRouter().getBackstackSize() > 1);
         }
         super.onAttach(view);
     }