Reach nodes by unique name instead of long paths

Nodes a script uses through a path of several nodes are marked unique in their
scene and found with %Name. The search list is renamed SearchResults, and the
player row's nodes get their real types.

MusicPlayer.tscn

@@ -56,6 +56,7 @@ layout_mode = 2
 size_flags_vertical = 4
 
 [node name="PlayTextureButton" type="TextureButton" parent="PlayerBar/MusicPlayerContainer"]
+unique_name_in_owner = true
 custom_minimum_size = Vector2(32, 32)
 layout_mode = 2
 focus_mode = 0
@@ -66,6 +67,7 @@ ignore_texture_size = true
 stretch_mode = 0
 
 [node name="RestartTextureButton" type="TextureButton" parent="PlayerBar/MusicPlayerContainer"]
+unique_name_in_owner = true
 custom_minimum_size = Vector2(32, 32)
 layout_mode = 2
 focus_mode = 0
@@ -77,16 +79,19 @@ stretch_mode = 0
 flip_h = true
 
 [node name="MusicPlayerSlider" type="HSlider" parent="PlayerBar/MusicPlayerContainer"]
+unique_name_in_owner = true
 layout_mode = 2
 size_flags_horizontal = 3
 size_flags_vertical = 4
 scrollable = false
 
 [node name="MusicTimeLabel" type="Label" parent="PlayerBar/MusicPlayerContainer"]
+unique_name_in_owner = true
 layout_mode = 2
 text = "0:00 / 0:00"
 
 [node name="VolumeSlider" parent="PlayerBar/MusicPlayerContainer" instance=ExtResource("5_iifuj")]
+unique_name_in_owner = true
 custom_minimum_size = Vector2(100, 0)
 layout_mode = 2
 size_flags_vertical = 4