ComboBox: labelFunc test failing

[bill]

In robot/test_ComboBox.html on FF3/mac, I get an error in labelFunc:

GROUP "labelFunc" has 2 tests to runbootstrap.js (line 641)
Error: labelFunc was supposed to have a value of Texas. Text is Minnesota, value is Minnesota bootstrap.js (line 641)

[bill]

Only happens when ComboBox or FilteringSelect is run from the test harness (for running multiple tests)....

Turns out the problem is that the cursor is positioned at a certain position on the screen such that when the labelFunc drop-down is opened (via keyboard commands), it happens to overlap the cursor position. Then the up/down arrows adjust the position in the drop down relative to where the mouse is, rather than relative to the first entry in the drop down.

Simple solution to avoid the test failure is to split mouse and keyboard tests into separate files.

[bill]

[18629] Split ComboBox and FilteringSelect mouse tests into separate files from the general (ComboBox and FilteringSelect) tests. Solves problem where unfortunate mouse position was interfering w/the keyboard tests.

The new files are named *_a11y.html to follow the existing pattern, although (like the other *_a11y test files) that's a misnomer since they contain all tests that don't use the mouse (keyboard, a11y role, general functionality, and even API tests).

Fixes #9084.

[bill]

(In [18732]) Fix typo in change to split ComboBox? and FilteringSelect? mouse tests into separate files. Refs #9084.