Wrong account is edited when deleting an account in edition mode

[hsoft]

If you start editing an account's name, then click on the "-" button, the edited account is deleted, then the account just under it gets edited. If the edited account is the last one, pressing the "-" button creates a crash:

@@@
Application Identifier: com.hardcoded_software.moneyguru
Application Version: 1.6.5

Traceback (most recent call last):
File "/Applications/moneyGuru.app/Contents/Resources/mg_cocoa.plugin/Contents/Resources/mg_cocoa.py", line 497, in setProperty_value_atPath_
File "moneyguru/gui/report.pyc", line 312, in name
AssertionError
@@@

[hsoft]

This kind of crash also happens if you change the account type (through the apanel) of a currently edited account (this is originally from #78).

[hsoft]

[milestone:id#51179 bulk edit command]

[hsoft]

(from [142]) [#77 state:fixed] Fixed crashes when changing an account type or deleting it while this account was under edition in the sheet.