1.3.0

Features (#5):

• Show a node's own text on the map: the "¶" header button (off by default)
• Selecting a node moves the editor's cursor to its line, Reading view included

Features (#7):

• Each note can have a mind map pane of its own
• The "🔗" header button links a map to its note's tab
• Header toggles ("hide completed", "show node text") are now each pane's own

Features (#8):

• Levels are shown by fill intensity, text size, border and edge thickness
• Every node of a level starts on the same left edge, so the depth reads off the
  column