Improve pagination text.

Give informations about total number of results per page.
People starts to count at 1.
Don't report error in case of dropped gadgets.

Previous page's service can generate errors (in case of listbox for example).
No need to report the error to the user, as he already switched to a new page.
Add a panel gadget.

Activate it on the frontpage and list view.
Revert merge from branch tristan

This reverts commit 8e3de22759c21066e993fcca72ca875497e7008e.
fixup! Accounting: Fix bug with closing period when all accounts have 0 balance

The assertion was not correct when account_type/expense & account_type/income
have child categories
Matrixbox: do not leave garbage in REQUEST['cell']
Revert "add erp5_sql_active_process business template."

This reverts commit 6a8987fbe66d78ffaec12d70e768b847a9cd16fb.
BTreeData: Implements more posix-ish sparse file

Writing 0 bytes or truncating past file end increases file length.
BTreeData: Trivial simplification.
BTreeData: Coding style.

Also, reuse existing local.
BTreeData: Fix data loss on chunk overwrite not reaching chunk end.
Drop support for Python < 2.7
Drop support for Zope < 2.13
style: use new syntax (from Python 2.7) for set comprehensions
style: use new syntax (from Python 2.7) for dict comprehensions
style: dict() -> {} (or better)
fixup! BTreeData: Fix data loss on chunk overwrite not reaching chunk end.

A simpler way to achieve the same fix.
[TestDistributor] Include computer_guid parameter on startTestSuite

  This parameter has been passed always by the erp5.util implementation. Introduce
  this parameter makes the API compatible for future implementation with support
  to scalability tests even if the current code is not ready yet.
Allow Managers to change document id through metadata tab