[IMP] account, invoice form view: show the reopen button anytime as soon as the conditions are met + added an help tooltip on it

bzr revid: qdp-launchpad@openerp.com-20111017075851-vn9zevb2dyd4i96t

addons/account/account_invoice_view.xml

@@ -305,8 +305,8 @@
                                     <button name="invoice_cancel" states="draft,proforma2,sale,open" string="Cancel" icon="gtk-cancel"/>
                                     <button name="action_cancel_draft" states="cancel" string="Reset to Draft" type="object" icon="terp-stock_effects-object-colorize"/>
 
+                                    <button name='%(action_account_state_open)d' type='action' string='Re-Open' attrs="{'invisible':['|', ('state','&lt;&gt;','paid'), ('reconciled', '=', True)]}" icon="gtk-convert" help="This button only appears when the state of the invoice is 'paid' (showing that it has been fully reconciled) and auto-computed boolean 'reconciled' is False (depicting that it's not the case anymore). In other words, the invoice has been dereconciled and it does not fit anymore the 'paid' state. You should press this button to re-open it and let it continue its normal process after having resolved the eventual exceptions it may have created."/>
                                     <button name="%(action_account_invoice_refund)d" type='action' string='Refund' states='open,paid' icon="gtk-execute"/>
-                                    <button name='%(action_account_state_open)d' type='action' string='Re-Open' states='paid' icon="gtk-convert" groups="base.group_no_one"/>
                                     <button name="invoice_proforma2" states="draft" string="PRO-FORMA" icon="terp-gtk-media-pause" groups="account.group_account_user"/>
                                     <button name="invoice_open" states="draft,proforma2" string="Validate" icon="gtk-go-forward"/>
                                     <button name="%(account_invoices)d" string="Print Invoice" type="action" icon="gtk-print" states="open,paid,proforma,sale,proforma2"/>