Fixed dialog tasks

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

@@ -4127,7 +4127,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                                 protected void onException(Bundle args, Throwable ex) {
                                     Helper.unexpectedError(getFragmentManager(), ex);
                                 }
-                            }.execute(FragmentKeywordManage.this, args, "message:keywords:manage");
+                            }.execute(getContext(), getActivity(), args, "message:keywords:manage");
                         }
                     })
                     .setNeutralButton(R.string.title_add, new DialogInterface.OnClickListener() {
@@ -4191,7 +4191,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                                     protected void onException(Bundle args, Throwable ex) {
                                         Helper.unexpectedError(getFragmentManager(), ex);
                                     }
-                                }.execute(FragmentKeywordAdd.this, args, "message:keyword:add");
+                                }.execute(getContext(), getActivity(), args, "message:keyword:add");
                             }
                         }
                     })

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

@@ -193,7 +193,7 @@ public class FragmentContacts extends FragmentBase {
                                 protected void onException(Bundle args, Throwable ex) {
                                     Helper.unexpectedError(getFragmentManager(), ex);
                                 }
-                            }.execute(FragmentDelete.this, new Bundle(), "contacts:delete");
+                            }.execute(getContext(), getActivity(), new Bundle(), "contacts:delete");
                         }
                     })
                     .setNegativeButton(android.R.string.cancel, null)

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

@@ -154,7 +154,7 @@ public class FragmentOperations extends FragmentBase {
                                 protected void onException(Bundle args, Throwable ex) {
                                     Helper.unexpectedError(getFragmentManager(), ex);
                                 }
-                            }.execute(DialogDelete.this, new Bundle(), "operations:delete");
+                            }.execute(getContext(), getActivity(), new Bundle(), "operations:delete");
                         }
                     })
                     .setNegativeButton(android.R.string.cancel, null)

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

@@ -507,7 +507,7 @@ public class Helper {
                                     else
                                         ToastEx.makeText(context, ex.toString(), Toast.LENGTH_LONG).show();
                                 }
-                            }.execute(FragmentDialogUnexpected.this, new Bundle(), "error:unexpected");
+                            }.execute(getContext(), getActivity(), new Bundle(), "error:unexpected");
                         }
                     })
                     .create();