gitadora: fix order of drums in Buttons tab (#531)

## Link to GitHub Issue, if one exists
n/a

## Description of change
Before this PR, drums were in the order they appear in test menu.

This is really confusing. Change it so that they appear in the order
they do in default drummania layout.

## Testing
validated manually in gw

src/spice2x/games/gitadora/io.h

@@ -66,18 +66,21 @@ namespace games::gitadora {
             DrumHelp,
             DrumButtonExtra1,
             DrumButtonExtra2,
-            // note: this is the order they appear in the test menu
+            // note: this is the order of drums in the default layout
+            DrumLeftCymbal,
             DrumHiHat,
-            DrumHiHatClosed,
-            DrumHiHatHalfOpen,
+            DrumLeftPedal,
             DrumSnare,
             DrumHiTom,
-            DrumLowTom,
-            DrumRightCymbal,
             DrumBassPedal,
-            DrumLeftCymbal,
-            DrumLeftPedal,
-            DrumFloorTom
+            DrumLowTom,
+            DrumFloorTom,
+            DrumRightCymbal,
+
+            // these only exist for back compat
+            // (created before it was possible to map multiple input to a button)
+            DrumHiHatClosed,
+            DrumHiHatHalfOpen
         };
     }