Author: Petr Škoda
MDL-36685 add missing TinyMCE string
http://git.moodle.org/gw?p=moodle.git;a=commit;h=dc5496f2ae0ef560f5c2c4603dad6fbd5a640d98
http://github.com/moodle/moodle/commit/dc5496f2ae0ef560f5c2c4603dad6fbd5a640d98
+ 2.3 en [table_dlg:cell_col,editor_tinymce]