Bump pom version from 1.25.0 -> 1.26.

Don't bother with a patch level version number.
Don't run doclint under JDK 8.

See http://stackoverflow.com/search?q=javadoc+doclint
Revert "Don't run doclint under JDK 8."

This reverts commit 5581231de4a148007b164f823c76ce1bc0f2d4de.
Don't hard-code the list of supported cell editors.

This means using reflection, but as it's in response to user activity
the performance hit shouldn't matter.