[toolboxes/desktoptoolbox] Remove unnecessary icon size values for PC3…

Authored by ngraham on Apr 2 2020, 5:55 PM.

Description

[toolboxes/desktoptoolbox] Remove unnecessary icon size values for PC3 toolbuttons

units.iconSizes.smallMedium is the default size, so setting the
icon size to this has no effect and is unnecessary.

Same as D28236

Details