[Bug 36002] Zoom In/Out hotkeys don't works with numpad key

[FrancisMarkham]

Public bug report changed:
https://launchpad.net/malone/bugs/36002

Description changed to:
    The hotkeys in epiphany for zooming in and zooming out are [ctrl] +
    [+] and [ctrl] + [-] respectively.  These hotkeys work using the [+]
    and [-] keys located next to the backspace key, but not using those
    located on the numpad.

    The status of the numlock does not seem to affect this.