remove useless commented code
improve method comments

Thanks to vincent for notifying

implement reset of signature using a searchAndActivate way to prevent doing too many thing in one transaction

Conflicts:
	product/ERP5SyncML/Tool/SynchronizationTool.py
	product/ERP5SyncML/tests/testERP5DocumentSyncML.py
	product/ERP5Type/tests/runUnitTest.py

also fix filter for SQLCatalog_trimInventoryCacheOnUncatalog same as SQLCatalog_trimInventoryCacheOnCatalog.

Use gadgets to render some part of ERP5 ui.

Use TabbularGadget API to render initial tab this way we can switch to from it flawlessly as it will be registered into TabbularGadget interla gadget_list structure.