(bug 43315) Cursor of enhancedchangelist wrong for non-toggle lines

The class mw-enhancedchanges-arrow was also used for non-toggle lines,
which have now the cursor. Now using mw-enhancedchanges-arrow-space for
the space and mw-enhancedchanges-arrow for the cursor.

Also fix bad aligned lines, when javascript is disabled. Here the
problem was, that only the arrows are display:noned, but the placeholder
space of single lines must also be display:noned.

Change-Id: Iba13987ced4c3e327026df2cb96b92a777e2032f
Merge "(bug 43315) Cursor of enhancedchangelist wrong for non-toggle lines"