The dropdown can be summoned by clicking on the search field. It will
only appear if the search field is not empty. When the search field is
not empty the dropdown can be also be summoned by clicking on the arrow
or search result count.
There are still some wrinkles where the dropdown doesn’t appear when
expected; I’d appreciate feedback to help reproduce those cases.
This change should still work with custom search result tabs.
Clicking on the advanced search ellipsis when there is a search string
will open the advanced search tiddler, and copy the current search term
to it.
Thanks to @Spangenhelm for the idea.
Also fixes a problem pointed out by @Evolena whereby the advanced
search counts hadn’t been adjusted to remove `$:/temp/advancedsearch`
from the search.
By rearranging the `[all[]]` operator we are able to ensure that shadow
tiddlers get processed before ordinary tiddlers. This makes it easier
to create custom stylesheets that override the core.
We get a significant speed improvement of >10% by rearranging filter
operators to bring to the front the operators likely to reduce the size
working list.
