Up to now, opening balance accounts have been identified by means of
fixed names and their translations, which in some cases is not
appropriate.
With this commit, therefore, opening balance accounts can now be
identified by a special slot, which should solve the above problem.
in gnc_find_or_create_equity_account(), when querying the
EQUITY_OPENING_BALANCE type, the system now first searches for an
account with an existing 'equity-type' slot having the value
'opening-balance' and returns it as an opening balance account if
one exists. If no corresponding account is found, the search is
continued as before. An account found in the process is automatically
given the status of an opening balance account (it is given an
'equity-type' slot with value 'opening-balance') to simplify the
future search.
The opening balance status of an account is visualized in the account
settings dialog with a check box. If a Gnucash file does not yet contain
an opening balance account, one can be selected in the account settings
dialog.
https://bugs.gnucash.org/show_bug.cgi?id=797836
<property name="tooltip_text" translatable="yes">This account holds opening balance transactions. Only one account per commodity can hold opening balance transactions.</property>