Don't depend on String prototype extension.
Remove non breaking space.
Hack in SearchTextField is no longer needed.
Correctly use string in bind-attr.
Remove handlebars helpers.

Since using handlebars helpers is an uncommon and unidiomatic way to
create Flame applications, it would be a better fit as a separate
project/library.
Whitespace fixes.
Clean up CSS.
Clean up event listeners in MenuView.
Remove dependency on Array prototype extension.