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Description of problem:
virt-viewer/remote-viewer currently uses the same window layout as is typical for gnome2 applications: top bar drawn by window manager contains close (minimize, maximize) button(s) and the menu bar inside application window contains menu items. It would be nice to follow gnome3 design guidelines and use
  * application menu + menu under icons instead of current menu
  * close button within application window
These changes would help r-v better fit to gnome-shell environment but mainly: they would save few dozen pixels of vertical screen estate now used for menu and top-bar to actual guest display.

Version-Release number of selected component (if applicable):
virt-viewer-0.5.7-5.el7.x86_64

How reproducible:
always

Steps to Reproduce:
1. run remote-viewer in gnome-shell
2.
3.

Actual results:
remote-viewer has gnome2 feel

Expected results:
remote-viewer uses client-side action buttons and global application menu giving "gnome3" look & feel

Additional info:

I don't think this is really feasible as long as we are still maintaining GTK2 support. Once GTK2 support is dropped, we can look at this.

keeping for future consideration, moving to 7.2 for now

imho this is a rather cosmetic change, could be considered outside of rhel scope 
unlikely to happen in 7.2, moving

moving to only RHEVM RFEs for PM to consider, if we want to match the look on all supported client platforms

oVirt 4.2.0 has been released on Dec 20th 2017. Please consider re-targeting this bug to next milestone

4.2.2 has been released long time ago. Re-target?

4.3.1 has been released, please re-target this bug as soon as possible.

Let's consider this cosmetic change for 4.4.
@David: Are you ok with delivering this in 4.4?

There was a good work in progress on this in 2017 and before, around GTK3 integration in virt-viewer.
Code is here [0], I'll give it a try on integrating with upstream next cycle.

[0] https://github.com/etrunko/virt-viewer/commits/dialogs