[5.1] Convert mod_toolbar to service provider

[joomlaweby]

Summary of Changes

Converts the toolbar administrator module to service provider.

Testing Instructions

1. Make sure you have administrator module mod_toolbar published
2. You should see module output

Actual result BEFORE applying this Pull Request

Module works as expected

Expected result AFTER applying this Pull Request

Module works same way as before applying pull request

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[ceford]

I have tested this item ✅ successfully on d3bca7b

Applied patch and looked at several admin pages - all toolbars worked normally (included logout/login).

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/42838.}

[fgsw]

I have tested this item ✅ successfully on d3bca7b

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/42838.}

[richard67]

RTC

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/42838.}

[LadySolveig]

Thank you @joomlaweby and also testing @ceford @fgsw