Description of problem:
- Unable to resize evince window in VNC using MWM

Version-Release number of selected component (if applicable):
- current

How reproducible:


Steps to Reproduce:
The issue is successfully reproduced at our end.

Forcefully created mwm :

Put 'PREFERRED=/usr/bin/mwm' in /etc/default/desktop
----------
 yum grouplist
  106  yum groupinstall "Server with GUI"
  107  init 5
  108  xinit -e /usr/bin/mwm 
  109  vi /etc/sysconfig/desktop
  110  yum install motif xterm
  111  startx
  112  evince
  113  yum install tigervnc tigervnc-server
  114  useradd abc
  115  passwd abc
  116  su - abc
  117  cp /lib/systemd/system/vncserver@.service /lib/systemd/system/vncserver@:1.service 
  118  vi /lib/systemd/system/vncserver@:1.service
  119  firewall-cmd  --permanent --zone=public --add-port 5901/tcp
  120  firewall-cmd --reload
  121  systemctl daemon-reload 
  122  systemctl enable vncserver@:1.service
  123  systemctl start vncserver@:1.service
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Steps to reproduce:
1. Login to a RHEL 7.2/RHEL 7.3 machine, physical or virtual
2. Install tigervnc and start a vnc server session with a simple xstartup file, eg. one that executes "exec /etc/X11/xinit/xinitrc"
3. Connect to the VNC session from another machine
4. Start mwm in the VNC session
5. Start evince in the VNC session
6. Try to resize evince by the window border.

Actual results:
- window will not resize

Expected results:
- window size adjustable

Additional info: