Bug 927174 - Add a "More Info..." link to the plugin click-to-activate panel which links to SUMO, r=jaws

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extra : transplant_source : %ED%19rO%FFy%9Be%83%7C%CD%E8%03%BB%5B%0F%D9W%21%2B
Fixup for bug 927174 - use the preexisting app.support.baseURL pref instead of a custom one a=lsblakk

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extra : amend_source : 89553fc529dd7f01370a444275365dbf346801da
extra : transplant_source : %9F%AA%8E%227%DB%9ERu%F5%01Q%26%12%0F3%DD%C7%60%F2