Fix for bottom toolbar staying in middle of page after entering text.

When entering text into a text area on Android the bottom toolbar will re-position
itself so that the user can see the text area while they enter text with the
virtual keyboard.
If the bottom toolbar, which appears above the virtual keyboard, hides the
text area then the bottom toolbar will be moved up so that the user can see
the text they are entering into the text area.

After the virtual keyboard is dismissed the bottom toolbar is positioned incorrectly.
It's not at the bottom of the page and it's buttons are not responsive.
Remove unused attributes
labelSet shouldn't be responder for touch

This helps ensure that label body view itself receives the touch.
Whitespace
RearrangeableParentView mixin

Helps with [#51918549]
Avoid rerendering when moving labels to front

[#51918549]

This greatly improves performance when a label is clicked on, vs. unnecessarily swapping the location of the label records themselves.
WTF: DOM side effect in computed property accessor
Quiet down other logging
Temporary/debugging: Log and time lots of stuff