Nyall Dawson 423b779411 [needs-docs] Add iface.pluginHelpMenu()
Returns a reference to the main window "Plugin Help" sub-menu.

Plugins are encouraged to insert help and about actions in this submenu instead of creating
a submenu under the pluginMenu() which solely contains Plugin Help or About actions.

For example, a plugin which only implements a processing provider should not
create additional ui menus just to link to the plugin help pages. Rather, they
should use this new submenu (available under the Help menu) to insert
their help links.
2019-09-12 11:27:42 +10:00
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