Provide an option to supply the aria-label attribute to the inputbox to
allow generated markup be accessible to screen readers
<inputbox>
type=search
width=120
buttonlabel=Search
arialabel=Search this wiki
</inputbox>
Bug: T242354
Change-Id: I40c62bc9889a4912b43244ec65e628ec8bc8533f
Directly use the UTF-8 encoding of the 'NO-BREAK SPACE' (U+00A0)
instead of the HTML/XML entitiy  .
Bug: T154300
Change-Id: Ica1a16c7114ec2c5bea04b21f14cf083eb4e417b
phan-taint-check gets confused when you escape a variable and
assign the escaped version to the same name as the unescaped
version.
Change-Id: I1bf4d64e68bff516b5f8b6266d85f67020008433