Currently WebTerminal is a good Tool for lab environments but for customers installation there a missing things ...
2 of them are already requested:
net0057263 - FEATURE Allow Resize of WebShell Terminal To Accomodate Additional Rows/Columns Of Output
net0057264 - FEATURE Allow WebShell Terminal To Launch Own Browser To Move Across Screens; Not Locked to XMC
As GTAC Article 000040727 mentions consult your local @Extreme account team, sales or SE to push these requests and hopefully let this FR be accepted.