Board and Library update issues causing breaking changes

[sterretje]

@rcroederats

We should have a option to stop all incoming updates.

@ptillisch

So if you like, you could just ignore the notifications. If you are annoyed by them, there is a way to disable the checks in the advanced settings. I'll provide instructions for that:

1. Press the Ctrl+Shift+P keyboard shortcut (Command+Shift+P for macOS users) to open the "Command Palette".
2. Select the "Preferences: Open Settings (UI)" command from the menu.
3. A "Preferences" tab will now open. Type arduino.checkForUpdates in the "Search Settings" field.
4. Uncheck the checkbox under the "Check For Updates" setting.
5. Click the X icon on the "Preferences" tab to close the tab.

@rcroederats

We should be able to force usage of a particular library version

For that purpose I personally use multiple portable installs of IDE 1.8.19, one for each project that has specific needs.