cleanup iemgui dialog form names, replacing dashes with underscores. Fix stray bugs in canvas dialog, and clean up css selector names

Reset the last search term after closing the canvas find dialog so that the next search restarts from the beginning again.

fix #172: Use border styles for the iemgui label anchors, and the gop_rectangle color for the gop move anchor

change from checking OS to checking nw version for the zoom_kludge (This way the OSX 10.8 binary can use lts 0.14.7 and get the kludge)

stop using "x" for sending iemgui colors-- while it has a precision formatter, it doesn't have a maximum size formatter (and it can't because 64-bit archs need the larger values)

cherry-pick Albert Gräf's branch: Comment out a bunch of debugging statements which add a lot of noise to the console.

- ret.split(";") should be ret.split(problem_chars[i])
- remove the function from dialog_canvas.html where it isn't needed

This automatically picks the right zoom level to make the patch fill the window as much as possible. Also fixes a missing call to pdgui.gui_canvas_get_scroll in the m.view.zoomreset menu command which caused the viewport not to be updated properly after resetting the zoom level in canvas windows.