'Graph' Tab > 'Style' Panel > 'Track Label Font' value does NOT reflect user selection

To reproduce:

• Load 3 graphs
• Choose 2 graphs and join them in the 'Graph' Tab > 'Operations' Panel
  • In 'Style' Panel of 'Graph' Tab click on drop down menu of 'Track Label Font' and choose a size aside from 12
    • SYMPTOMS:
      • The 'Track Label Font' drop down menu works when clicked, BUT after selection of a font size, the default value of 12 remains regardless of what it's set to. The actual track label font size DOES change in the main viewer to the user selected size.
      • This version of IGB(13674) does not have a right-click option to change the color or font size of the track(could be work in progress as older versions retained this ability)
        • Older versions with right-click option allowed the font size to change but the change was not displayed in the 'Graph' Tab > 'Style' Panel > 'Track Label Font' as it remained the default value of 12.

• NOW choose all 3 graphs and join them in the 'Graph' Tab > 'Operations' Panel
  • In 'Style' Panel of 'Graph' Tab click on drop down menu of 'Track Label Font' and choose a size aside from 12
    • SYMPTOMS:
      • The 'Track Label Font' drop down menu works when clicked, BUT after selection of a font size, the default value of 12 remains regardless of what it's set to. The actual font size in the main viewer DOES NOT change to the size set by the user in this case.

• Issue was tested with single graphs and no problems occurred. Only with 'Joined Graphs'