MM for MacOS: Add standard meanings (not descriptions) to shapes

Hello:

I was recently building a swimlane diagram using MM 22 for macOS. I discovered that some flowchart shapes had their meanings pop up when the cursor hovers over that shape; others had descriptions of the flowchart shape pop up. This should be standardized to display symbol meaning, as not everyone uses flowchart symbols every day.

And not all standard flowchart shapes are represented in MM 22 for macOS. See https://www.zenflowchart.com/flowchart#Flowchart-Symbols