Update most demos for Godot 4.0.beta10 (#782)

loading/threads/project.godot

@@ -16,10 +16,14 @@ run/main_scene="res://thread.tscn"
 config/features=PackedStringArray("4.0")
 run/low_processor_mode=true
 config/icon="res://icon.png"
+run/stretch/aspect="expand"
+run/stretch/mode="canvas_items"
 
 [display]
 
 window/vsync/vsync_mode=0
+window/stretch/mode="canvas_items"
+window/stretch/aspect="expand"
 
 [rendering]
 

loading/threads/thread.tscn

@@ -13,15 +13,26 @@ script = ExtResource("1")
 
 [node name="Load" type="Button" parent="."]
 layout_mode = 1
-anchors_preset = -1
-anchor_left = 0.4
-anchor_top = 0.15
-anchor_right = 0.6
-anchor_bottom = 0.2
+anchors_preset = 5
+anchor_left = 0.5
+anchor_right = 0.5
+offset_left = -115.0
+offset_top = 96.0
+offset_right = 115.0
+offset_bottom = 151.0
+grow_horizontal = 2
 size_flags_horizontal = 2
 size_flags_vertical = 2
+theme_override_font_sizes/font_size = 24
 text = "Load in Thread"
 
+[node name="ColorRect" type="Panel" parent="."]
+layout_mode = 0
+offset_left = 461.0
+offset_top = 160.0
+offset_right = 692.0
+offset_bottom = 489.0
+
 [node name="TextureRect" type="TextureRect" parent="."]
 layout_mode = 1
 anchors_preset = 8