overlay: helper modal dialog for picking option values (#561)

## Link to GitHub Issue or related Pull Request, if one exists

## Description of change
Introduce a new modal dialog for picking out some of the options to
improve UX.

Implemented a few for now:

1. UI for picking ASIO drivers from a list (for -iidxasio, -sdvxasio,
-asioconvert, etc)
2. Button to generate card numbers for -card0 and card1
3. Processor Affinity selector (very similar to what's in Windows Task
Manager, list of checkboxes)
4. file selector (file open dialog for various file path overrides like
log file)
5. folder selector (folder override)

I wrote a selector for COM ports as well but how we use the value was
inconsistent (\\\\.\\COMx vs. COMx) and didn't see a huge point in it so
I didn't check it in.

## Testing

src/spice2x/rawinput/rawinput.cpp

@@ -38,6 +38,10 @@ namespace rawinput {
     uint32_t MIDI_NOTE_SUSTAIN = 20;
 
     static MidiNoteAlgorithm MIDI_NOTE_ALGORITHM = MidiNoteAlgorithm::V2;
+
+    // the price we pay for making spice overlay consume from raw input
+    // making focus detection a nightmare
+    bool OS_WINDOW_ACTIVE = false;
 }
 
 rawinput::MidiNoteAlgorithm rawinput::get_midi_algorithm() {