Convert most demos to GLES 2

Also fix Viewport error in 3D scaling demo, add an icon to Multiplayer Bomber, and rename BPM sync files.

gui/drag_and_drop/project.godot

@@ -27,3 +27,7 @@ window/stretch/aspect="expand"
 [gdnative]
 
 singletons=[  ]
+
+[rendering]
+
+quality/driver/driver_name="GLES2"

gui/input_mapping/project.godot

@@ -57,3 +57,7 @@ dash={
 "events": [ Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"alt":false,"shift":false,"control":false,"meta":false,"command":false,"pressed":false,"scancode":16777237,"unicode":0,"echo":false,"script":null)
  ]
 }
+
+[rendering]
+
+quality/driver/driver_name="GLES2"

gui/rich_text_bbcode/project.godot

@@ -34,4 +34,5 @@ multithread/thread_rid_pool_prealloc=60
 
 [rendering]
 
+quality/driver/driver_name="GLES2"
 environment/default_clear_color=Color( 0.145098, 0.145098, 0.164706, 1 )

gui/translation/project.godot

@@ -42,4 +42,5 @@ multithread/thread_rid_pool_prealloc=60
 
 [rendering]
 
+quality/driver/driver_name="GLES2"
 environment/default_clear_color=Color( 0.145098, 0.145098, 0.164706, 1 )