(Redmine issue: #3387)

(Redmine issue: #6308)

(Redmine issue: #1017)

* Unified item creatupdate view templates.
* Improved item management module unit tests.
* Redesigned 'users' module unit tests.

(Redmine issue: #3443,#1017,#4410)

* Removed unnecessary docstrings.
* Fixed some Pylint warnings.
* Unified coding style.

(Redmine issue: #3443)

(Redmine issue: #3443)

(Redmine issue: #3387)

(Redmine issue: #3387)

(Redmine issue: #4489)

(Redmine issue: #3387)

(Redmine issue: #3443)

Also removed unnecessary docstrings.

(Redmine issue: #4410,#1017,#3443)

Also removed unnecessary docstrings.

(Redmine issue: #4410,#1017,#3443)

(Redmine issue: #4410,#1017,#3443)

(Redmine issue: #3443)

(Redmine issue: #4410,#1017,#3443)

Also removed unnecessary docstrings.

Redmine issue: #4410,#1017,#3443)

Also removed unnecessary docstrings.

Redmine issue: #4410,#1017,#3443)

(Redmine issue: #6126)

Moving link to web and adding link to data in report email. Accompanying change in web version. (Redmine issue: #6255)

(Redmine issue: #6222)

(Redmine issue: #6127, #6222)

(Redmine issue: #6222)

(Redmine issue: #3443)

Also removed unnecessary docstrings.

Redmine issue: #4410,#1017,#3443)

Also removed unnecessary docstrings.

Redmine issue: #4410,#1017,#3443)

Also removed unnecessary docstrings.

Redmine issue: #4410,#1017,#3443)

Also removed unnecessary docstrings.

(Redmine issue: #4410,#1017,#3443)

Also removed unnecessary docstrings.

(Redmine issue: #4410,#1017,#3443)

Also removed unnecessary docstrings.

(Redmine issue: #4410,#1017,#3443)

Also removed unnecessary docstrings.

(Redmine issue: #4410,#1017,#3443)

(Redmine issue: #3387)

(Redmine issue: #3443)

This bug was introduced in version 2.11.0 and is fixed in 2.11.2, which is not yet released. Reference:

	https://github.com/pallets/jinja/issues/1145

In previous version it was necessary to manually signal flask principal about identity change. Now it is not necessary anymore, it even results in infinite recursion loop.

(Redmine issue: #3443,#1017,#3387)

(Redmine issue: #4410,#1017,#3443)

(Redmine issue: #4410,#1017,#3443)

(Redmine issue: #3387)