Nyall Dawson 95d68e9172 [processing] Default to hiding help button for algorithms
And require that showing help is opt-in. Apart from a handful
of built-in providers, most providers will not have help pages
available within the QGIS documentation (including model and
script algorithms). Accordingly, we should hide the help button
by default and only show it for these selected providers.

Note that 3rd party algorithms can still specify custom helpUrl
urls, in which case the button WILL be shown.
2018-09-26 04:26:49 +10:00
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