Added try again to error screen

app/src/main/java/eu/faircode/email/ActivityError.java

@@ -44,6 +44,7 @@ public class ActivityError extends ActivityBase {
     private Button btnPassword;
     private ImageButton ibSetting;
     private ImageButton ibInfo;
+    private Button btnReload;
     private Button btnSupport;
 
     @Override
@@ -60,6 +61,7 @@ public class ActivityError extends ActivityBase {
         btnPassword = findViewById(R.id.btnPassword);
         ibSetting = findViewById(R.id.ibSetting);
         ibInfo = findViewById(R.id.ibInfo);
+        btnReload = findViewById(R.id.btnReload);
         btnSupport = findViewById(R.id.btnSupport);
 
         load();
@@ -177,6 +179,15 @@ public class ActivityError extends ActivityBase {
             }
         });
 
+        btnReload.setVisibility(account > 0 ? View.VISIBLE : View.GONE);
+        btnReload.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                ServiceSynchronize.reload(v.getContext(), account, true, "retry");
+                finish();
+            }
+        });
+
         btnSupport.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {

app/src/main/res/layout/activity_error.xml

@@ -119,6 +119,17 @@
                         app:barrierDirection="bottom"
                         app:constraint_referenced_ids="ibSetting,ibInfo" />
 
+                    <Button
+                        android:id="@+id/btnReload"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:layout_marginTop="24dp"
+                        android:drawableEnd="@drawable/twotone_sync_24"
+                        android:drawablePadding="6dp"
+                        android:text="@string/title_boundary_retry"
+                        app:layout_constraintStart_toStartOf="parent"
+                        app:layout_constraintTop_toBottomOf="@id/barrier" />
+
                     <Button
                         android:id="@+id/btnSupport"
                         android:layout_width="wrap_content"
@@ -128,7 +139,7 @@
                         android:drawablePadding="6dp"
                         android:text="@string/menu_faq"
                         app:layout_constraintStart_toStartOf="parent"
-                        app:layout_constraintTop_toBottomOf="@id/barrier" />
+                        app:layout_constraintTop_toBottomOf="@id/btnReload" />
                 </androidx.constraintlayout.widget.ConstraintLayout>
             </androidx.cardview.widget.CardView>
         </androidx.constraintlayout.widget.ConstraintLayout>