Revert overridden applyAuthorStyles for now for explicitness and experiments
Fix Ace editor view

Move #editorArea out of spark_polymer_ui.html and into spark_polymer.html, and all respective styles from .css to .css. Ace styles are injected into the global scope when Ace component gets initialized in the outer spark_polymer.dart: therefore, they were unable to pierce through <spark-polymer-ui> shadowDOM boundary in M34, where applyAuthorStyles got removed.
Fix fileTreeView in Chrome M34

Moved out of spark_polymer_ui.html and into spark_polymer.html, including corresponding styles.
Fixed suggest box styling (also altered from the original to look better)
Explicit style for dialogs to avoid inadvertant styling of underlying overlays
Fixed a typo in pre-previous commit + removed unnecessary div
Removed dead code
Fixed treeview context menu not hiding on an outside click

The Element was defined in <spark-polymer-ui>, but accessed from outside (ultimately in files_controller.dart). After applyAuthorStyles elimination, styling for this no longer worked, and so did hiding, since it relied on certain styles applied.