When I press Ctrl+;
and type, VS searches both in file names and in C++ symbols (e.g. function names, class names). That would be OK, except that it is much slower than previous VS versions, due to this new feature.
How do I make it search only in file names?
The textbox you type in is actually a combobox.
Click the dropdown button on the right and unselect "Search within file contents".
After checking, the Solution Explorer will refresh on it's own.