Caret At Bidi Boundary

This test ensures WebKit lets user place caret around bidirectional text properly.

Current offset: abcאבג0 1 2 3 5 4 6 0 1 2 3 6 5 4 3 נת122 3 4 1 4 (There is a bug. Clicking on the left of 12 should result in offset 0.) 2 3 4 2 1 0 לש נ ת0 3 2 1 4 4 3 2 1 0 aקל12יםd0 1 6 3 4 5 2 7 8 0 1 7 6 5 3 4 5 3 2 1 7 8 12 קל43 ab4 5 6 3 0 1 2 7 8 4 5 6 4 3 2 0 1 2 6 7 8 abcלשנ6 1 2 6 5 4 3 0 1 2 3 6 5 4 3