* refactor: move the OEIS search bar into its own component.

* doc: Basic Modfill -> two OEIS-based Specimens in Gallery

* feat: Dummy search results that pop up on input

* feat: Call a dummy search cmd on input

* feat: list of links and labels for search results

* feat: Clicking on a result adds it

* fix: When you click on link in results don't also add

* feat: Actually search the OEIS.

* feat: Cache search results and reopen search on click.

* ui: Layout and caption changes per design discussions

* fix: Never cache OEIS sequences with infinite indices
   This PR attempts to resolve numberscope#407. I added a half-dozen OEIS
   sequences as rapidly as I could and didn't get any errors.
   So hopefully this has squashed the problem, but it's hard to
   be certain.

* fix: Don't update URL until after parameter values have settled
   In order to be sure that parameter values have their "final" values
   in the case of an update (e.g., by calling the Paramable validate()
   method), it is necessary for a cascade of functions to be made async.
   This commit makes those changes and then awaits the validate() in the
   user interface, so that the URL won't be updated until all of the
   consequences of validate() have occurred (which may, for example,
   involve changing the parameter values, perhaps even the one that
   originally had its tentative value modified, necessitating the validate()
   call).

   Resolves numberscope#403.

* ui: show finger cursor over search results

* make oeis.org link open new tab

* info icon for info in search results

* ui: click off list of OEIS search results closes it

* fix: Restore sequences adding when you click on them in result list.

* fix: Various fixes to OEIS search bar/results per meeting

  - Return to the OEIS ID being a link but add the Wikipedia
    "external link" icon
  - Highlight the description of each sequence as you mouse over it,
    to provide clue you can click on it (to add as a sequence). The
    color used is a lightened version of the "primary" Numberscope color.
  - Display a message when there are no sequences to show as a result
    of a search. Note this can occur because there are _too many_ matches,
    or _no_ matches, and there is no way to tell which is the case from
    the OEIS api response, unfortunately. The message reflects this.
  - Fixed bug that results were being cached under the wrong search term
    if the searcher typed more while the search was executing.
  - Make sure that enter/clicking on magnifier always fires search

* fix: Don't make switcher cards for dummy message IDs

* fix: Really make sure magnifier puts/keeps search results up; reword message

* fix: catch errors in OEIS searching and report a 'soft' failure

---------

Co-authored-by: Kate Stange <[email protected]>

…lizer

  Vue reactivity and parameter updating were interacting poorly. This commit
  protects against this bad interaction in two ways:

  1. Only changes to values that have different string forms than the
     previous value.  This ensures, for example, that a reactive value is not
     modified just because it is not `===` to the apparently "new" value.
  2. Changes the `parameterChanged()` method to be called once for each
     parameter change to `parametersChanged()` so that multiple simultaneous
     changes are bundled into one call.

  With these changes, the startup sequence is more predictable. We hope this
  change will make end-to-end testing significantly more reproducible.

  Also makes Turtle not restart drawing from the beginning of the path on
  a resize, since it is now able to redraw the full path so far without
  difficulty.

  Also fixes the default value for the `highlight` parameter of FactorFence;
  the multiple initializations were masking the prior erroneous value.

…entries