1.  Proposed title of this feature request
   • Set minimal width on tree-view in VirtualMachines page
2. What is the nature and description of the request?
3. Why does the customer need this? (List the business requirements here)
   • If the tree-view width is reduced too much, the text in it breaks, and the view itself becomes useless.

The screenshots show the tree-view at 150, 250, 350 px width. The minimal width probably should be no less than 250px.