Format markdown text on display

[ddrury]

Better (and simpler) attempt at solving issue #4123

To achieve this:

• Recent changes to the census assistant have been reverted (this obviates the need for retrospective changes to existing notes)
• Added two trailing spaces to html in abstractElement::valueFormatted()
• Whenever some formatted text is needed used code similar to this

$element = new SubmitterText('');
$formatted = $element->value($text, $tree);

[codecov]

Codecov Report

Merging #4135 (269bc4c) into main (cc4c83a) will not change coverage.
The diff coverage is 0.00%.

@@            Coverage Diff            @@
##               main    #4135   +/-   ##
=========================================
  Coverage     25.87%   25.87%           
  Complexity    11175    11175           
=========================================
  Files          1573     1573           
  Lines         48225    48225           
=========================================
  Hits          12479    12479           
  Misses        35746    35746           

Impacted Files	Coverage Δ
app/Elements/AbstractElement.php	73.83% <0.00%> (-0.70%)	⬇️
app/Functions/FunctionsPrint.php	0.00% <0.00%> (ø)
app/Http/RequestHandlers/ManageMediaData.php	22.78% <0.00%> (ø)
app/Http/RequestHandlers/NotePage.php	0.00% <ø> (ø)
app/Media.php	0.00% <0.00%> (ø)
app/Module/CensusAssistantModule.php	0.00% <0.00%> (ø)
resources/views/note-page-details.phtml	0.00% <0.00%> (ø)
resources/views/note-page.phtml	0.00% <ø> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update cc4c83a...269bc4c. Read the comment docs.