Overhaul item and inventory and clean up bits and pieces

Zennysoft.Game.Ma/src/app/App.tscn

@@ -10,9 +10,16 @@
 process_mode = 3
 script = ExtResource("1_rt73h")
 
+[node name="ColorRect" type="ColorRect" parent="."]
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+color = Color(0, 0, 0, 1)
+
 [node name="MainMenu" parent="." instance=ExtResource("2_1uiag")]
 unique_name_in_owner = true
-visible = false
 
 [node name="OptionsMenu" parent="." instance=ExtResource("2_v0mgf")]
 unique_name_in_owner = true
@@ -24,5 +31,6 @@ visible = false
 
 [node name="LoadingScreen" parent="." instance=ExtResource("3_3st5l")]
 unique_name_in_owner = true
+visible = false
 top_level = true
 z_index = 999