Fixed user edit dialog always showing a rate. (fixes #395)

number_format always returns a number, even for empty values. Therefore
use the same formatting method here as in every other floater.
Rerecorded entries are always not cleared. (fixes #421)

It makes no sense to rerecord an entry which will immediately be
cleared.
Options column is always the first in all adminpanel tables.
Fixed wide floaters in the nordic skin.

It is necessary for the timesheet entry floater to be wider because the
input fields are wider. Otherwise the textareas are misplaces. See
http://forum.kimai.org/index.php?topic=1945.msg7739#msg7739
Fixed starting multiple recordings. (fixes #419)

It was possible to start multiple recordings by applying a filter so
that the current recording was not shown anymore. This worked because
the running recording was determined from the list of shown entries.

The fix is to always check in the database if a recording is running and
return its information.
Merge pull request #443 from ServiusHack/issue/419

Fixed starting multiple recordings. (fixes #419)
Merge pull request #442 from ServiusHack/nordic_skin_floater_too_thin

Fixed wide floaters in the nordic skin.
Merge pull request #441 from ServiusHack/options_column_first

Options column is always the first in all adminpanel tables.
Merge pull request #439 from ServiusHack/issue/421

Rerecorded entries are always not cleared. (fixes #421)
Merge pull request #438 from ServiusHack/issue/395

Fixed user edit dialog always showing a rate. (fixes #395)