FIX: show random allocated remoteDebuggerPort on the simulator dashboard
open connect remote devtools chrome page and inject allocated remote debugger port as default
detect if connect devtools could be enabled and show/hide connect button
show connect button or allocated remote debugger port + minor tweaks

- show connect button on Firefox >= 20.0a1 (where connect devtools xhtml page is available)
- show allocated remote debugger port on previous Firefox releases as fallback
- minor tweaks (comply with code conventions, fix typos and unclosed tags)
integrated mozApps uninstall command on the remove button and reinstall (update) on undo
added error detection on install app helpers + other minor tweaks
use our own version of io/file to work around bug 836061
use &hellip; to represent ellipsis
disable Connect... button when hiding it to work around bug that it is somehow still clickable when disabled
Merge branch 'rpl-feature-open-connect-devtools' into integration
Merge branch 'rpl-feature-mozApps-uninstall' into integration