[Lazarus] ProjectGroups: fixed LPG XML structure

[Ondrej Pokorny]

On 15.11.2019 21:53, Mattias Gaertner via lazarus wrote:
> On Fri, 15 Nov 2019 21:29:10 +0100
> Ondrej Pokorny via lazarus <lazarus at lists.lazarus-ide.org> wrote:
>
>> Hello,
>>
>> I just fixed the XML structure of LPG project group files.
> What was the bug?

1.) The <Mode?> elements were not placed within the <BuildModes> element.

2.) I updated the structure like I did for the LPI files: 
https://bugs.freepascal.org/view.php?id=22752

>> Old files
>> will be loaded correctly but the new LPG file cannot be opened in a
>> legacy Lazarus installation.
>>
>> AFAIK project groups are usable only in trunk so this does not matter
>> (?) Otherwise we would need some legacy option checkbox like it is in
>> the LPI project files.
> Don't forget to add it to
> https://wiki.lazarus.freepascal.org/Lazarus_2.2.0_release_notes

Thanks for the reminder. I'll update the page about both LPG and LPI files.

Ondrej