Meaning of star icon overlay in Visual Studio 2022's Autos Window - visual-studio

What is the meaning of the star icon overlay that appears in Visual Studio 2022's Autos Window? (Could not find anything even remotely related :-( In fact, what do the icons mean? I guess they are IntelliSense icons.)

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Can't get a text window to appear, anyone know what to do?

I already tried changing the font, text colour and theme but still nothing. I'm using Visual Studio 2019 and opened Visual Studio through Unity, here's the image:
Sometimes it happens to me too, double click on the script and it pops up the blank Visual Studio screen like that. To resolve the error I just go back to Unity (keeping Visual Studio open) and double click on the script, at which point the script appears on Visual Studio.

Make Visual Studio open tool window floating

I like to display the results of the right-click > "Find All References" command of Visual Studio 2017 in a floating window and close the window when I'm done. However, every time I close the "references" window and then invoke "Find All References" again, the results are again docked to the bottom of the IDE. Is there a way to prevent this from happening?
This works by default with Visual Studio 2019.
With visual Studio 2017 15.9.12 the behavior is like you describe and I see no way to change this.

Display icons instead of words in Visual Studio tool window tabs

It's trivial, I know, but yesterday, out of nowhere, Visual Studio 2012 Professional started displaying "Solution Explorer", "Team Explorer - Home", etc. in the tabs instead of nice little icons. Does anyone know how to bring back the icons?
There is an extension that does just that. It was written for VS 2015 but works fine in VS 2017.
Visual Studio Iconizer for Visual Studio 2015
Icons are displayed when the widths of the tabs are too narrow. To get the icons back, either make the pane narrower or dock some more tabs in that pane.

Visual Studio 2012 mouse flicker

In Visual Studio 2012, any time the mouse is over a Debug "Watch" or "Autos" Window, OR if the mouse is over a String Table, it flickers horribly on every update. Trying to scroll down through the String Table is so painful - you can watch each item get repainted with the mouse flickering the whole time (I have to move the mouse out of the window and then page up and down with the keyboard).
This didn't happen with Visual Studio 2008.
Interestingly, it also does not happen when I Remote Desktop to the exact same computer, same Visual Studio 2012 install, and even the same project.
The "Use hardware graphics acceleration if available" setting has no affect one way or the other.

How Visual Studio displays controls in the toolbox depending on the document open

I wanted to know how Visual Studio Toolbox displays only a sub-set of Controls of all the controls depending on the document open. Document can be any file, for example, when WindowsForms is open, any component that can be dropped appears on the toolbox.
How does Visual Studio does it?
I have Visual Studio SDK installed. How do I know which tabs are hidden and which tabs are displayed. (Of course "Show All.." is unchecked).
Thanks!!
-Datte

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