(dev/joomla#24) Stop CiviCRM's joomla.css from modifying Joomla 4 header background colour

[andrewpthompson]

Overview

See https://lab.civicrm.org/dev/joomla/issues/24.
This PR stops the Joomla 4 header from having its background colour modified to blue by CiviCRM's joomla.css

Before

When on a CiviCRM backend page the Joomla 4 header will change from white to blue background.

After

Joomla's header will have a white background as it does on non-CiviCRM pages.

Technical Details

Removed #header { background-color: #69c; } which seemed to have no purpose on earlier Joomla versions.

Comments

[civibot]

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[colemanw]

@lcdservices can you confirm this fix?

[eileenmcnaughton]

or @vingle

[eileenmcnaughton]

@vingle @lcdservices the question is 'does this do any harm on the existing Joomla! version' - happy to accept @andrewpthompson's word on Joomla! 4 impact as that is WIP at this stage & will be maturing for a while

[vingle]

No harm to J 3.9.11 for me.

[eileenmcnaughton]

Thanks