Remove old and unused project settings, update various demos for 4.2 (#1024)

- Move all demo projects that don't require Forward+/Mobile-only features
  to the Compatibility rendering method. This improves performance significantly
  on low-end devices and ensures visuals are identical to a web export
  of the demo.
- Set deadzone on all inputs to 0.2 for better gamepad usability.
- Remove reliance on `default_env.tres` to use built-in Environment
  resources in the main scene instead (which follows the preview environment
  workflow).
- Remove notices pointing to GDNative or VisualScript, since both were
  removed in 4.0.
- Various bug fixes and usability tweaks to 10+ demos.

2d/physics_tests/README.md

@@ -12,7 +12,7 @@ They can be used for different purpose:
 
 Language: GDScript
 
-Renderer: GLES 2
+Renderer: Compatibility
 
 Check out this demo on the asset library: https://godotengine.org/asset-library/asset/888
 

2d/physics_tests/project.godot

@@ -29,60 +29,60 @@ window/stretch/aspect="expand"
 [input]
 
 ui_left={
-"deadzone": 0.5,
+"deadzone": 0.2,
 "events": []
 }
 ui_right={
-"deadzone": 0.5,
+"deadzone": 0.2,
 "events": []
 }
 ui_up={
-"deadzone": 0.5,
+"deadzone": 0.2,
 "events": []
 }
 ui_down={
-"deadzone": 0.5,
+"deadzone": 0.2,
 "events": []
 }
 toggle_full_screen={
-"deadzone": 0.5,
+"deadzone": 0.2,
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":70,"physical_keycode":0,"key_label":0,"unicode":0,"echo":false,"script":null)
 ]
 }
 exit={
-"deadzone": 0.5,
+"deadzone": 0.2,
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":16777217,"physical_keycode":0,"key_label":0,"unicode":0,"echo":false,"script":null)
 ]
 }
 toggle_debug_collision={
-"deadzone": 0.5,
+"deadzone": 0.2,
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":67,"physical_keycode":0,"key_label":0,"unicode":0,"echo":false,"script":null)
 ]
 }
 restart_test={
-"deadzone": 0.5,
+"deadzone": 0.2,
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":82,"physical_keycode":0,"key_label":0,"unicode":0,"echo":false,"script":null)
 ]
 }
 toggle_pause={
-"deadzone": 0.5,
+"deadzone": 0.2,
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":80,"physical_keycode":0,"key_label":0,"unicode":0,"echo":false,"script":null)
 ]
 }
 character_left={
-"deadzone": 0.5,
+"deadzone": 0.2,
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":16777231,"physical_keycode":0,"key_label":0,"unicode":0,"echo":false,"script":null)
 , Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":65,"physical_keycode":0,"key_label":0,"unicode":0,"echo":false,"script":null)
 ]
 }
 character_right={
-"deadzone": 0.5,
+"deadzone": 0.2,
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":16777233,"physical_keycode":0,"key_label":0,"unicode":0,"echo":false,"script":null)
 , Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":68,"physical_keycode":0,"key_label":0,"unicode":0,"echo":false,"script":null)
 ]
 }
 character_jump={
-"deadzone": 0.5,
+"deadzone": 0.2,
 "events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":16777232,"physical_keycode":0,"key_label":0,"unicode":0,"echo":false,"script":null)
 , Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":87,"physical_keycode":0,"key_label":0,"unicode":0,"echo":false,"script":null)
 ]
@@ -91,3 +91,8 @@ character_jump={
 [memory]
 
 limits/message_queue/max_size_kb=10240
+
+[rendering]
+
+renderer/rendering_method="gl_compatibility"
+renderer/rendering_method.mobile="gl_compatibility"