New version already available @rin67630 @sistralsrl: 2.9.7
Thanks for your feedback @sistralsrl, and thank you very much for using a private cloud instance 
- If it is crashing it may be related with your computer and browser. Dashbaords settings and configuration does not depend on your instance size, as everything is handled by your browser. What browser are you using? OS? RAM? Do you have any device sending at a high report interval?
- Not sure if I understand you, as all lists and selectors for devices can handle search by identifier. Do you mean using the name field instead of its id for searching and listing?
- The last 2.9.7 version allows handling 3 times more widgets vertically. Hope it is enough
If you are creating very large dashboards it could explain also point 1. How many widgets do you have? - A placeholder for the data source? Uhm, will look into it!
- Will look into it also, but we have an ongoing rework to support much more widgets and make it much more customizable (it should answer @rin67630 comment about vertical bars).
Bests!