title: Missing Widgets in GNU radio companion (GRC)
body: <p>I have started using GNU radio and was following this <a href="https://www.youtube.com/watch?v=N9SLAnGlGQs" rel="nofollow noreferrer">YouTube tutorial</a> series to get familiar with GRC. 
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  <p>While following along with the tutorials I noticed that I am missing many of the GUI widgets that the tutor was using, for example, the variable slider widget.
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  <p>I realise that the blocks ultimately translate to some python code, and we could create our own widgets, but the issue is with missing default widgets.</p>
  
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  <p>It may be relevant to state here that the software was installed using the synaptic package manager following the instructions <a href="https://drive.google.com/file/d/13zCymh0GmYrRRiDOwv12rt1mylSADyRW/view?usp=sharing" rel="nofollow noreferrer">given here.</a></p>
  
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  <p>Is there a fix for this? Maybe some more packages available on Synaptic? </p>