[3.2] minimal header part 2

[Atticus29]

Fix implementations for minimal header in:

• /checklists/checklistmap.php?clid=78&thesfilter=0&taxonfilter=
• /checklists/clgmap.php?pid=7

As well as any other areas identified as missing.

Replace all references of minimal_header_template.php to minimal_header.php to enable customizable minimal header.

Change default value of $SHOULD_USE_MINIMAL_MAP_HEADER = false; to $SHOULD_USE_MINIMAL_MAP_HEADER = true;

Global search replace $shouldUseMinimalMapHeader = $SHOULD_USE_MINIMAL_MAP_HEADER ?? false; to $shouldUseMinimalMapHeader = $SHOULD_USE_MINIMAL_MAP_HEADER ?? true;

Address the fact that the hamburger menu is really fat.

More gracefully deal with the positional conflicts in e.g. collections/map/index.php with the "Open Search Panel" button if just block styling is used.

[Atticus29]

@themerekat I vote we put this back in triage until a decision gets made about Laravel, at which point this is potentially something we'd want. This was something we were hoping to implement for 508 compliance, but moot now that we screen-reader workarounds and 508 approval. Thoughts?