Add & use default error icon and title

[#39]
Move error modal to top level template

[#39]
Migrate errors from alert to error overlay

[#39]
remove unused requires
Remove hive-search module as it is no longer in use
Fix auth error message
Rename error-modal to flash-modal

[#39]
Convert type alert to flash modal

[#39]
Flash modal can be dismissed with enter or esc key

[#39]
Close waggle overlay when user dismisses error dialog

[closes #46]
setup widget for currency-overlay
move all overlays outside of frame
merge commit
remove typo
migrate code from settings -> send -> currency-overlay
fix references to preferredCurrency