Add pressed states for the all apps button and the home button.

We'll need another asset for the selected state, when we do that.
This also updates the all apps icon to be a grid.
diff --git a/res/raw/rollo2.c b/res/raw/rollo2.c
index ad7b18f..eb87063 100644
--- a/res/raw/rollo2.c
+++ b/res/raw/rollo2.c
@@ -246,7 +246,7 @@
 draw_home_button()
 {
     color(1.0f, 1.0f, 1.0f, 1.0f);
-    bindTexture(NAMED_PFTexLinear, 0, params->homeButtonId);
+    bindTexture(NAMED_PFTexLinear, 0, state->homeButtonId);
 
     float scale = 2.0f / SCREEN_WIDTH_PX;