IDE Freezes after opening filedialog or messagebox

Hi,

In the windows version of the Arduino IDE is a very annoying bug, that disables the main window. the only way to end the task is go close it with taskmanager.

It has something to do with the update popup.
You can reproduce the freeze by:

-opening the IDE
-wait for the "Updates available for some of your boards and libraries" popup (don't close it)
-press CRTL-O / CRTL-S to open the file dialog
-press ESC to close it

now the IDE window isn't responding anymore.

I hope someone can fix this.

Regards,

Reinald

Reproduce this on the Windows version of the Arduino IDE: open the IDE, leave the “Updates available for some of your boards and libraries” popup open, press CTRL-O or CTRL-S, then press ESC. Start by tracing the interaction between the update popup and the file or save dialog. Done means the main window remains responsive after the dialog closes.

Written by the indexing model from the issue text.