nested sequence enhancements

ui/renderfunctions.cpp

@@ -169,7 +169,7 @@ GLuint compose_sequence(Viewer* viewer,
 								}
 								clip_is_active = true;
 								if (c->track >= 0) audio_track_count++;
-							} else if (c->open) {
+							} else if (c->finished_opening) {
 								close_clip(c, false);
 							}
 						} else {
@@ -181,7 +181,7 @@ GLuint compose_sequence(Viewer* viewer,
 					if (is_clip_active(c, playhead)) {
 						if (!c->open) open_clip(c, !rendering);
 						clip_is_active = true;
-					} else if (c->open) {
+					} else if (c->finished_opening) {
 						close_clip(c, false);
 					}
 				}

ui/timelinewidget.cpp

@@ -22,6 +22,7 @@
 #include "dialogs/newsequencedialog.h"
 #include "mainwindow.h"
 #include "ui/rectangleselect.h"
+#include "playback/playback.h"
 #include "debug.h"
 
 #include "project/effect.h"
@@ -548,6 +549,14 @@ void TimelineWidget::mouseDoubleClickEvent(QMouseEvent *event) {
 			sequence->selections.append(s);
 			update_ui(false);
 		}
+	} else if (panel_timeline->tool == TIMELINE_TOOL_POINTER) {
+		int clip_index = getClipIndexFromCoords(panel_timeline->cursor_frame, panel_timeline->cursor_track);
+		if (clip_index >= 0) {
+			Clip* c = sequence->clips.at(clip_index);
+			if (c->media != nullptr && c->media->get_type() == MEDIA_TYPE_SEQUENCE) {
+				set_sequence(c->media->to_sequence());
+			}
+		}
 	}
 }