rawinput: reimplement analog relative mode and delay (#674)

## Link to GitHub Issue or related Pull Request, if one exists
#181 

## Description of change
Implement analog relative mode and delay option using a new
millisecond-based algorithm.

## Testing
WIP

src/spice2x/launcher/options.h

@@ -69,8 +69,6 @@ namespace launcher {
             IIDXAsioDriver,
             IIDXBIO2FW,
             IIDXTDJMode,
-            IIDXTTDelayP1,
-            IIDXTTDelayP2,
             spice2x_IIDXDigitalTTSensitivity,
             IIDXDigitalTTSocd,
             spice2x_IIDXLDJForce720p,