Add a "Join Node to Way" action in addition to "Join Way to Node"

[avarab@…]

(See also #4549)

The existing "Join Node to Way" action is misnamed, but what it does in this situation:

y
|
| x----
|
y

Is to turn the data into this:

y
\
 x----
/
y

I'd like an additional action that does this:

y
|
x------
|
y

It's very useful in situations like the one I'm attaching a screenshot of where I'm merging unconnected ways to a known-good main road. Currently to do this I have to:

1. Shift-click to add a node to the intersection of the dotted line road / the main road
2. Shift-click on the dotted line road to add it to the selection
3. Split
4. Select the leftover part of the dotted road and delete it.

If this feature were added I could just:

1. Select the end node of the dotted line road
2. Press W, or whatever the shortcut will be.

[avarab@…]

An example of data I'd like to edit more easily