Tweaking Pattern and Song editor

ChangeLog

@@ -83,6 +83,35 @@
 		- The tempo used left of the first tempo marker is painted in a
 		  darker color.
 		- The currently used Tempo Marker gets highlighted.
+		- Tags have been moved into Timeline (next to the Tempo Markers)
+		  in order to make room to accommodate the cursor in the ruler to
+		  highlight the current position
+		- Tags can be inserted by left-clicking the bottom area of the
+		  Timeline (above the ruler).
+		- Clicking the ruler is now always enabled and automatically
+		  switches transport into Song Mode.
+		- Full-size playhead
+		- The icons in the pattern list indicating whether a pattern is
+		  playing in stacked pattern mode are now colored and can have four
+		  different states: on, off, off next (pattern is played till the
+		  end and then turned off), and on next (pattern is played as soon
+		  as transport is looped again)
+	* PatternEditor UX tweaks:
+		- Relocating transport by clicking the ruler is now supported
+		  (like in the SongEditor) and automatically switches transport
+		  into Pattern Mode.
+		- Full-size playhead
+		- The ruler was decoupled from the currently selected pattern. It
+		  always has the size of the largest playing pattern and always
+		  shows the transport position using a playhead. Whether or not the
+		  current pattern is played back is indicated by a full-height
+		  cursor.
+		- All note properties except of the note key can now be altered in
+		  both the drum pattern editor and the piano roll editor by
+		  right-clicking and dragging a note.
+		- All notes of the currently playing patterns will be hinted in
+		  stacked pattern mode. Even those exceeding the length of the
+		  current pattern.
 	* OSC API
 		- Add command /Hydrogen/LOAD_DRUMKIT
 		- Add command /Hydrogen/UPGRADE_DRUMKIT