GTK: Allow keypad to be used for all tab selection accelerators.
GTK: Allow keypad to be used for all tab selection accelerators.

(the only other accelerator that uses a number is ctrl+0, and that already accepts the keypad)

BUG=18229

Review URL: http://codereview.chromium.org/159799

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@22289 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser