v1.1.2 - Minor bug fixes when working with .psout and unit measurement

Updated the old legacy name for unit measurements from '$ALIAS_UM_9124$' to '$Unit$' in:

• MTB.pslx, and
• pscad_update_ums.py

Updated figureSetup.csv so that the default EMT signals for unit measurements are:

• '$Unit$\xxxx'

Fixed the bug that plotly's create_image_plot function does not like '$' in legend names by automatically removing all '$' from signal names in the plotter.py script

This implies that the default legend names for the EMT signals from the unit measurement will simply be displayed as:

• 'Unit\xxxx'