Lint cleanup.
Speeds up and slims down the `SC.View.prototype.adjust` method. When a single key is passed to `adjust()` it no longer creates an Object just to iterate the single key. Likewise, the resulting call to `_checkForResize()` on layout changes is improved by removing the creation of two Objects used for testing and by removing the over achieving test (the test covered the case of concurrent effective border and size changes, which are very rare and not critical to fail the test).