Fixes incorrect indentation we got previously when they were used in a
statement context.

So you now get
enum A { a = 2,
         b = 3,
       };

This will allow much faster indenting of selected areas as the state
doesn't have to be checked again for every line.

Reviewed-by: Roberto Raggi

Keep more information by using enter() instead of turnInto() when moving
from a *_start to *_open.

This was a regression introduced in 8e4fb678
triggersCompletion should return `true' when the token at the left of the T_LPAREN
is an identifier, a SIGNAL, a SLOT or T_GREATER (for template functions).

Done-with: Erik Verbruggen

A mostly mechanical change.

Reviewed-By: con

columnNumber() relies on text wrapping, and we're only interested in the
position of the cursor in the block.

Also removed TokenUnderCursor as it's functionality is in the token cache.

Reviewed-by: ckamm

This reverts commit c2393df0.

This should speed things up a bit, because before, the line was tokenized at
least 3 times.

Don't sort the global completion items when we have too many of them, instead
populate the completion box in a way where local symbols are showed before
global symbols.