Fix project names to use consistent casing

This also makes the name of the 2D platformer demo more descriptive.

2d/light2d_as_mask/project.godot

@@ -10,7 +10,7 @@ config_version=3
 
 [application]
 
-config/name="Using Lights As Mask"
+config/name="Using Lights as Mask"
 run/main_scene="res://lightmask.tscn"
 config/icon="res://icon.png"
 

2d/platformer/project.godot

@@ -10,7 +10,7 @@ config_version=3
 
 [application]
 
-config/name="Platformer"
+config/name="Platformer 2D"
 run/main_scene="res://stage.tscn"
 config/icon="res://icon.png"
 target_fps="60"

misc/sensors/project.godot

@@ -10,7 +10,7 @@ config_version=3
 
 [application]
 
-config/name="Accelerometer, magnetometer and gyro demo"
+config/name="Accelerometer, Magnetometer and Gyro Demo"
 run/main_scene="res://main.tscn"
 config/icon="res://icon.png"
 

viewport/2d_in_3d/project.godot

@@ -10,7 +10,7 @@ config_version=3
 
 [application]
 
-config/name="2d in 3d"
+config/name="2D in 3D"
 run/main_scene="res://2D_in_3D.tscn"
 config/icon="res://icon.png"
 

viewport/3d_in_2d/project.godot

@@ -10,7 +10,7 @@ config_version=3
 
 [application]
 
-config/name="3d in 2d"
+config/name="3D in 2D"
 run/main_scene="res://3D_in_2D.tscn"
 config/icon="res://icon.png"
 

viewport/gui_in_3d/project.godot

@@ -10,7 +10,7 @@ config_version=3
 
 [application]
 
-config/name="gui in 3d"
+config/name="GUI in 3D"
 run/main_scene="res://Gui_in_3D.tscn"
 config/icon="res://icon.png"
 

viewport/screen_capture/project.godot

@@ -10,7 +10,7 @@ config_version=3
 
 [application]
 
-config/name="Screen capture"
+config/name="Screen Capture"
 run/main_scene="res://capture_screen.tscn"
 config/icon="res://icon.png"