Add support email.
Closes #9803

* correct xpath to add style in report.styles
* informations about style troubleshoot

closes #9105

Closes #9202

Closes #9013

Closes #8810

Closes #8523

Closes #8497

Closes #9104

Closes #9167

Closes #9547

Closes #9516

Also added some styling for guilabel as it was indistinguishable from
regular body text.

Closes #8928

Closes #8857

During reconciliation wizard, the wizard tries to find the best match with
exisiting unreconciled lines.
When more than one line could be reconciled with the bank statement line, the
oldest line was not selected.
e.g.
- statemement line: 10€
- invoice 1: 10€
- invoice 2: 10€
- invoice 3: 5€

The statement line was reconciled with the 5€ invoice instead of the first one.
This was due to the domain not matching when the exact same amount was found.

Sign CLA for compassionCH

Closes #8767

closes #8783

Signed through OPW 650573

References to `date_end`
were previously corrected to `date_stop`,
in revision 98bd6732,
but one of them was missed.

Closes #4463

Closes #8460

- Many CLA PRs initially fail the CLA check because the email
used in the signature is not the git committer email, so we
cannot match them.
- Minor spellchecking

The `unittest2` package is simply a backport of `unittest` from the
Standard Library of Python 2.7 to previous versions.

There is no reason to use it any longer.

Closes #6941