Anim Picker issues and Viewport Freeze

[sbudhram]

Thank you for your continued support on this tool!

Describe the bug
Trying to resize the Anim Picker view will eventually cause the Maya Viewport to stop updating. Maya restart is required after the issue.

To Reproduce
Environment:
macOS Catalina 10.15.4
Maya 2018.5
mGear 3.5.0

• Launch Maya with a new scene.
• From the mGear menu: mGear -> Shifter -> Guide Template Samples -> Biped Template.
• Select the 'rig' object, then build the rig (mGear -> Shifter -> Build from Selection)
• Load the Anim Picker via the mGear menu
• Load the biped.pkr file (Load -> Select File -> biped.pkr -> Load Picker -> OK)

Few issues appear at this point:

• Actually clicking the 'Load Picker' button is hard to do (some misalignment between the button and the highlight area, see the video)
• The view for the picker initially shows only the bottom left portion of the buttons, must be resized with the mouse wheel
• Where the mouse cursor is doesn't correlate with what is highlighted in the picker. The mouse is offset by an arbitrary amount from what it is highlighting in the picker (this is not representative in the video, but if you try to mouse over elements you will see the issue).

Try to resize the Anim Picker a few times, and then try to manipulate the view port. The viewport will become unresponsive and require a Maya restart.

Screenshots
mGear3-5viewportfreeze.mp4.zip

Additional information
I have some other 3rd party plugins installed, so it would be worth seeing if this is an issue for everyone with Maya 2018 on macOS Catalina.