It would be nice in the "VA Open File In Solution" dialog if a second field could be used for file exclusion (using the '-' symbol). Let me explain.
A nice feature of this dialog is that it remembers what was the last entry and selects the text when opened. So let say I have 'asset dialog -moc' to exclude _moc.cpp files generated by QT. But it would be nice if I could specify the exclusion in another field so these are remembered each time and not part of the selected text when I open the dialog so if I start typing I lose my exclusion and have to reenter them. So we could have one line to filter files and a second field for exclusion such as -moc -html ..., etc. Most of the time you want to keep your exclusion.
Use the context menu in the Open File in Solution dialog to display the edit control for the persistent filter. Hide the edit control after adding the text that you want to always persist. The text affects filtering whether or not the control is visible.