Replace composite setSelection actions from EventNormalizer

[dmo-odoo]

For some events like compositions, we trigger a setSelection on
the composed word then an insertText. However, the user never
selected anything, so this simulation is somewhat wrong.

Since we can now give a range as command parameter, we should
update the normalizer to use this mechanism rather than trigger a
somewhat fake setSelection action.

Basically, we need to "replicate" this commit in the current master:
fed9705