:gamepad: Rework keyboard mapping

In order to make the decelerate / reverse jeep control available
without mapping it to the up and down left joystick.

godot/project.godot

@@ -36,25 +36,25 @@ ui_select={
 }
 move_left={
 "deadzone": 0.2,
-"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194319,"key_label":0,"unicode":0,"echo":false,"script":null)
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":65,"key_label":0,"unicode":97,"echo":false,"script":null)
 , Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":0,"axis_value":-1.0,"script":null)
 ]
 }
 move_right={
 "deadzone": 0.2,
-"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194321,"key_label":0,"unicode":0,"echo":false,"script":null)
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":68,"key_label":0,"unicode":101,"echo":false,"script":null)
 , Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":0,"axis_value":1.0,"script":null)
 ]
 }
 move_forward={
 "deadzone": 0.2,
-"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194320,"key_label":0,"unicode":0,"echo":false,"script":null)
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":87,"key_label":0,"unicode":44,"echo":false,"script":null)
 , Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":1,"axis_value":-1.0,"script":null)
 ]
 }
 move_back={
 "deadzone": 0.2,
-"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194322,"key_label":0,"unicode":0,"echo":false,"script":null)
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":83,"key_label":0,"unicode":111,"echo":false,"script":null)
 , Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":1,"axis_value":1.0,"script":null)
 ]
 }
@@ -80,17 +80,19 @@ get_in={
 secret={
 "deadzone": 0.5,
 "events": [Object(InputEventJoypadButton,"resource_local_to_scene":false,"resource_name":"","device":-1,"button_index":2,"pressure":0.0,"pressed":false,"script":null)
-, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":81,"key_label":0,"unicode":59,"echo":false,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":81,"physical_keycode":81,"key_label":81,"unicode":59,"echo":false,"script":null)
 ]
 }
 analog_main={
 "deadzone": 0.1,
 "events": [Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":5,"axis_value":1.0,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194320,"key_label":0,"unicode":0,"echo":false,"script":null)
 ]
 }
 analog_secondary={
 "deadzone": 0.1,
 "events": [Object(InputEventJoypadMotion,"resource_local_to_scene":false,"resource_name":"","device":-1,"axis":4,"axis_value":1.0,"script":null)
+, Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":-1,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194322,"key_label":0,"unicode":0,"echo":false,"script":null)
 ]
 }
 ui_pause={