Converter: correct logic for byte monitor orientation
Converter: preserve transparency of EDM Text Controls
Converter: Added a font scaler instead of look up table.
Converter: improve XY graph conversion

 - Add log scales if chosen
 - Set empty strings for axis labels if none present
 - Remove legend by default
 - All fonts in EDM graphs are the same
 - All EDM graph borders are one pixel, black
Converter: no legend on EDM 2DProfileMonitor
Converter: correct labels for related display

If there's no text on the original, put "" instead of the default
label.
Merge remote branch 'cssgh/master' into converter
Merge pull request #645 from dls-controls/converter

EDM converter improvements