- moved make_image from gui_tool.c to into gui_util.c as well
- generalized set_frame_image and moved it to gui_util.c as set_image
- tool_button_press_event didn't check which button was pressed
- added buttons to switch visibility of frames, vectors, and measurements
- when creating a measurement through the GUI, don't invert if both points are
minima (otherwise, one could never get the text point the other way)
git-svn-id: http://svn.openmoko.org/trunk/eda/fped@5411 99fdad57-331a-0410-800a-d7fa5415bdb3
