Revert "Remove ignoreEditableText param" (#12766)
This reverts commit 6262596.
In issue #12746 it was reported that moving by paragraph in Google Docs in Google Chrome would sometimes result in NVDA saying "blank" for certain paragraphs.
Similarly although not noted in an issue yet, Some lines in Thunderbird message composition windows would also say blank.
These regressions were found to be caused by the merging of pr #12500
Further investigation found that the specific commit in the pr that caused this was 6262596
I'm not entirely sure on why this commit causes the regression, however my understanding is that this commit was only to improve readability / understanding of logic along the way and that the actual feature introduced by the pr had no dependency on this commit as such.
Thus, this pr reverts that single commit, and therefore fixes #12746.
Perhaps the logic of this commit can be better investigated at a later stage, but for now it is better to return to what we know works.
