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It likely depends on your version of Lithium, but on 18.8 and 18.7, the TinyMCE version is 4.3, therefore that will be the reference point for the jump to 4.7.
It likely depends on your version of Lithium, but on 18.8 and 18.7, the TinyMCE version is 4.3, therefore that will be the reference point for the jump to 4.7.