[LyX/master] Reset require_fresh_start_ after buffer has been viewed/exported

[Richard Kimberly Heck]

On 6/1/24 03:11, Jürgen Spitzmüller wrote:
> Am Samstag, dem 01.06.2024 um 07:10 +0000 schrieb Juergen Spitzmueller:
>> commit e1cb15ee5d9377cef6e3683a6d0bb68eb9b379c1
>> Author: Juergen Spitzmueller <spitz at lyx.org>
>> Date:   Sat Jun 1 09:06:44 2024 +0200
>>
>>      Reset require_fresh_start_ after buffer has been viewed/exported
>>      
>>      The LFUN buffer-reset-export states to start afresh the export
>> for the
>>      next run, but in fact, the boolean was never reset, so that this
>> was
>>      done for all subsequent runs unless the buffer had been closed
>> and
>>      reopened.
>>      
>>      Now the lfun does what it states and only acts on the next pass.
> This is candidate for stable.

Cherry picked.

Riki