audio fixes

res/content/base/block_materials/grass_block.json

@@ -0,0 +1,5 @@
+{
+    "steps-sound": "steps/grass",
+    "place-sound": "blocks/ground_place",
+    "break-sound": "blocks/ground_break"
+}

res/content/base/block_materials/ground.json

@@ -1,5 +1,5 @@
 {
     "steps-sound": "steps/ground",
-    "place-sound": "steps/ground_place",
-    "break-sound": "steps/ground_break"
+    "place-sound": "blocks/ground_place",
+    "break-sound": "blocks/ground_break"
 }

res/content/base/blocks/flower.json

@@ -1,5 +1,6 @@
 {
     "texture": "flower",
+    "material": "base:grass",
     "draw-group": 1,
     "light-passing": true,
     "obstacle": false,

res/content/base/blocks/grass.json

@@ -1,5 +1,6 @@
 {
     "texture": "grass",
+    "material": "base:grass",
     "draw-group": 1,
     "light-passing": true,
     "obstacle": false,

res/content/base/blocks/grass_block.json

@@ -1,5 +1,5 @@
 {
-    "material": "base:grass",
+    "material": "base:grass_block",
     "texture-faces": [
         "grass_side",
         "grass_side",

res/content/base/blocks/leaves.json

@@ -1,3 +1,4 @@
 {
-    "texture": "leaves"
+    "texture": "leaves",
+    "material": "base:grass"
 }