sys_expandpathelems: replacement for @pd_help should be the last element on the path, not the first.

Some gentle reformatting to make the Markdown more standards-compliant, so that it renders correctly on Github.

Simplify the pipeline in sys_initloadpreferences() so that we read the preferences directly using plutil now.

This is done by importing the config data using 'defaults import' in
one go, which is *much* faster than the previous implementation which
invoked the shell to run 'defaults write' for each individual key.

Intelligent patching mode 4 often just always prefers option A (outgoing
connections). But if the user actually wants option B (incoming connections),
he can't get it because option A was chosen. This is confusing, which is why
mode 4, while very useful if it works as intended, can be rather difficult to
use right now.

We therefore now take into account the status of the ctrl modifier, which
simply reverses our choice of option A or B, so that the user now has a way of
getting option B even if option A is preferred (and vice versa). If the ctrl
modifier isn't pressed, mode 4 works exactly as before, so this change is
fully backwards-compatible.

fix dropdown menu on Windows-- it uses nw.js 0.14.7 which didn't include the "forEach" method for DOM nodelists

Backported vanilla commit 67b3095a by Ant1r: Fix the way signal scalars are searched into the list of inlets of an object.