View keyboard resolution too small in gkbd-keyboard-display

[Omk]

When selecting "Keyboard Layout Chart" in Gnome, or running gkbd-keyboard-display, the resulting view is by default displayed too small. The window does not have "Maximize" handle, but can be enlarged by pulling the handle. Even when made to fill the full laptop screen, the chart does not cover the whole screen, but there are wide grey margins on both left and right edges.

This is problematic specially when using some specific asian language layout, such as bengoli, tamil or devanagari (indian) layouts, where certain symbols look very similar but have minor differences.

- The view should have "Maximize" button
- The gray margins should be smaller
- Zoom in / out button would be useful
- Magnifying glass which one could hover over the keys would be also practical

Description: Ubuntu 14.04 LTS
Release: 14.04

gkbd-capplet:
  Installed: 3.6.0-0ubuntu2
  Candidate: 3.6.0-0ubuntu2
  Version table:
 *** 3.6.0-0ubuntu2 0
        500 http://fi.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
        100 /var/lib/dpkg/status