Proper grid snapping for audio clips, adjust audio clip and timeline styling

Controls/AudioClip.tscn

@@ -23,10 +23,11 @@ theme_override_styles/panel = SubResource("StyleBoxFlat_8tb17")
 script = ExtResource("1_iy5jd")
 
 [node name="Panel" type="Panel" parent="."]
-custom_minimum_size = Vector2(0, 14)
+custom_minimum_size = Vector2(0, 20)
 layout_mode = 1
 anchors_preset = 10
 anchor_right = 1.0
+offset_bottom = 20.0
 grow_horizontal = 2
 
 [node name="Label" type="Label" parent="Panel"]
@@ -36,7 +37,29 @@ anchor_right = 1.0
 anchor_bottom = 1.0
 grow_horizontal = 2
 grow_vertical = 2
-theme_override_font_sizes/font_size = 8
+theme_override_font_sizes/font_size = 10
 text = "New Audio Clip"
 vertical_alignment = 1
 text_overrun_behavior = 3
+
+[node name="Window" type="ConfirmationDialog" parent="."]
+title = "\"New Audio Clip\" Properties"
+size = Vector2i(400, 600)
+
+[node name="Control" type="Control" parent="Window"]
+layout_mode = 3
+anchors_preset = 0
+offset_left = 8.0
+offset_top = 8.0
+offset_right = 92.0
+offset_bottom = 51.0
+size_flags_horizontal = 3
+size_flags_vertical = 3
+
+[node name="Label" type="Label" parent="Window/Control"]
+layout_mode = 0
+offset_right = 40.0
+offset_bottom = 23.0
+text = "Clip properties!"
+
+[connection signal="on_double_click" from="." to="Window" method="popup_centered"]