overlay: redesign Options tab(s) (#747)

## Link to GitHub Issue or related Pull Request, if one exists
#0

## Description of change
Combine API/Options/Advanced/Development/Search tabs into one Options
tab and add a left nav for navigation categories.

Reduce information density for options table by making each row double
the height and slightly increasing widget sizes.

## Testing

src/spice2x/cfg/option.h

@@ -46,6 +46,8 @@ struct OptionDefinition {
 
     // for OptionPickerType::FilePath
     std::string file_extension = "";
+
+    std::string quick_setting_category = "";
 };
 
 class Option {