Version 0.4.9 - button style updates, TinyMCE fixes, listing options and more

• Added more specific css selector to reduce font size of window title on popup windows
• Changed default # of listings to 12, 24, 48
• Making 1-column 2-column and 3-column listing options work
• Making listings match the height of the row
• Added background color to listings (default light gray)
• Added option for background color to listings shortcode
• Added toggles for listings variables
• Fixed Background scrolling issue on config page
• Configured modal launch so that there is no "double scrolling" in Chrome
• Added magnifying glass icon on the right of search buttons