Restore call to _updateLineRange on inline editor change

For #2919.

@jasonsanjose - could you review this? It looks like the call to `_updateLineRange()` got removed as part of https://github.com/adobe/brackets/pull/2516 way back when. I'm guessing that was just an oversight and the only desired change there was to remove the call to `refresh()`, but wanted to double-check with you.