specified images are now displayed whether or not the geometry data is
point data

Change-Id: Iae398e12c7a0c13995575fa73e2d0f6a6d9c29f1
added error messages to column selectors

Change-Id: I4686df43ca0b2afbc954f6669ad3e9dbc5fa0fd9
layer list now displays help text when no layers are added

Change-Id: I9b807407be64e4f9594abb94296055934e115775
Removed old PlotLayerEditor.

Change-Id: I93a594de0fb8e12c8921e7680c5390de69a41513
GUI cleanup.
Switched mx:ColorPicker to CustomColorPicker.

Change-Id: I2e96e6a578cc71534bdc42e33deca26283418a06
cleaning up labels

Change-Id: I0e99ef5b6cfa0da9ed30d8233429436d7f99eb06
fixed bug where map pan buttons wouldn't work

Change-Id: I114b4ea98bc15c19c2121935c46578eafeccc552
code cleanup

Change-Id: I3f7975f129515f55e6973cae471a614660adf34d
removed unnecessary embedded image
made embedded image static
fixed null pointer error
now blocking enter key when text input is empty
Added translate option.
Improved behavior of grouped and group setters.
fixed bug with null vs "null"
fixed label positioning bugs.
fixed crash when hash map contained non-columns
Cleaned up GUI controls. Made zoom/pan buttons bigger. Replaced zoom
controls scale property with zoom slider height.
fixed null pointer errors
Fixed title bar display bugs.
Embedded images are now static.
Title bar buttons are now easier to press (hidden border catches mouse).
Invisible resize border is now drawn exactly to the pixel.
Code cleanup.
fixed label display bugs

Change-Id: Ifa4b52e93fc81a17cae6919e6e4aa9a9c63bc753