title: Mac generating ∆˚¬ characters instead of executing VSCode shortcuts that involve alt / option key
body: <p><strong>Problem</strong><br>
  When I type <code>alt+j</code>, I always get the character <code>∆</code>, even if I've assigned <code>alt+j</code> to a keyboard shortcut within VSCode.  </p>
  
  <p>The same is true for any other alphanumeric keys, but non-character-generating keys work fine with alt, like <code>alt+upArrow</code>.  </p>
  
  <p>Therefore, I can't use the <code>alt</code> key as a modifier for many keyboard shortcuts.  </p>
  
  <p>I realize this is normal MacOS behavior for text input, but I'm wondering:  </p>
  
  <p><strong>Question</strong><br>
  Can VSCode override / takes-precedence-over the OS, so that I can use the <code>alt</code> key for keyboard shortcuts?  </p>
  
  <p><strong>Tried so far</strong><br>
  I've searched for settings within VSCode and MacOS, but haven't found anything obvious.  I've also edited <code>keybindings.json</code>, to no effect.  </p>