Fix filtering users in the member list

src/models/userfiltermodel.cpp

@@ -8,7 +8,7 @@
 bool UserFilterModel::filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const
 {
     Q_UNUSED(sourceParent);
-    if (m_filterText.length() < 1) {
+    if (!m_allowEmpty && m_filterText.length() < 1) {
         return false;
     }
     return sourceModel()->data(sourceModel()->index(sourceRow, 0), UserListModel::DisplayNameRole).toString().contains(m_filterText, Qt::CaseInsensitive)
@@ -27,4 +27,15 @@ void UserFilterModel::setFilterText(const QString &filterText)
     invalidateFilter();
 }
 
+bool UserFilterModel::allowEmpty() const
+{
+    return m_allowEmpty;
+}
+
+void UserFilterModel::setAllowEmpty(bool allowEmpty)
+{
+    m_allowEmpty = allowEmpty;
+    Q_EMIT allowEmptyChanged();
+}
+
 #include "moc_userfiltermodel.cpp"