Juggling Lab Files

Added a "Save" menu option for patterns and pattern lists, which remembers the last save location without prompting (171). For pattern lists saved to disk, using the filename as list title if one has not been explicitly set (174). Enlarged the pattern input text box into a multi-line control, making it easier to enter long patterns (169). Fixed problems handling siteswap patterns containing spaces (170). Fixed problem loading patterns without a version specifier in <jml> tag (175). Fixed bug that caused titles of duplicated patterns to revert (176). Changed rendering of ladder diagram to look better across a range of widths. Improved performance of adding complex patterns to pattern lists.