"align in circle" doesn't work as per code comments

[richlv]

AlignInCircleAction.java comment says :

When is selected node that is part of the way, then make a regular polygon, selected
node doesn't move.

this currently doesn't work that way, selected node moves as well.

I would also suggest to change some of the comments :

a) "special case if no single nodes are selected and exactly one way is" to
"special case if no nodes are selected and exactly one way is"

b) "When is selected node that is part of the way, then make" to
"When a single node that is part of the way is selected, make"

[Don-vip]

see also #8431

[richlv]

hmm, my original comment got mutilated a bit :)

"come of the comments :"
was supposed to be
"i would also suggest to change some of the comments :"