Remove default full screen from web build

Author: Razoric480

project.godot

@@ -45,7 +45,7 @@ window/size/window_height_override=600
 window/stretch/mode="canvas_items"
 window/stretch/aspect="keep_height"
 window/vsync/vsync_mode=false
-window/size/fullscreen=true
+window/size/mode.web=0
 
 [editor]