Merge branch '411-clear-ing-empty-test-tab' into 'master'

Resolve "Clear'ing empty test tab"

Closes #411

See merge request !296

src/correction.cpp

@@ -130,6 +130,10 @@ void FailedChecksTableModel::setFailedChecks(std::vector<plausibility::FailedChe
 
 bool FailedChecksTableModel::removeRows(int row, int count, const QModelIndex &parent)
 {
+    if(count == 0)
+    {
+        return true;
+    }
     beginRemoveRows(parent, row, row + count - 1);
 
     for(int i = 0; i < count; ++i)