Add sandbox controller

src/css/ingame_hud/sandbox_controller.scss

@@ -0,0 +1,47 @@
+#ingame_HUD_SandboxController {
+    position: absolute;
+    background: $ingameHudBg;
+    @include S(padding, 5px);
+    @include S(bottom, 10px);
+    @include S(left, 10px);
+
+    @include SuperSmallText;
+    color: #eee;
+    display: flex;
+    flex-direction: column;
+
+    > label {
+        text-transform: uppercase;
+    }
+
+    .hint {
+        color: #aaa;
+    }
+
+    .plusMinus {
+        @include S(margin-top, 4px);
+        display: grid;
+        grid-template-columns: 1fr auto auto;
+        align-items: center;
+        @include S(grid-gap, 4px);
+
+        button {
+            @include PlainText;
+            @include S(padding, 0);
+            display: flex;
+            align-items: center;
+            justify-content: center;
+            @include S(width, 15px);
+            @include S(height, 15px);
+            @include IncreasedClickArea(0px);
+        }
+    }
+
+    .additionalOptions {
+        @include S(margin-top, 10px);
+        button {
+            @include IncreasedClickArea(0px);
+            @include SuperSmallText;
+        }
+    }
+}

src/css/main.scss

@@ -51,6 +51,7 @@
 @import "ingame_hud/interactive_tutorial";
 @import "ingame_hud/color_blind_helper";
 @import "ingame_hud/shape_viewer";
+@import "ingame_hud/sandbox_controller";
 
 // prettier-ignore
 $elements: 
@@ -77,6 +78,7 @@ ingame_HUD_BlueprintPlacer,
 ingame_HUD_Waypoints_Hint,
 ingame_HUD_Watermark,
 ingame_HUD_ColorBlindBelowTileHelper,
+ingame_HUD_SandboxController,
 
 // Overlays
 ingame_HUD_BetaOverlay,