Cache our compat lookups for our message webview - (They're expensive on
older devices - and pointless not to reuse)
upgrade our android-support library in the hopes that the newer version
might fix some perf issues with the older one
Don't invalidate the options menu from the message list as we open a
message. We also invalidate it (twice) as we show the message. It turns
out to have measurable performance impact on 2.3 thanks to ABS
4.507 updates
lift the 'share' menu item for messages out of the 'send' menu to make it discoverable
changelog update
Bumped manifest to 4.507
Revert "lift the 'share' menu item for messages out of the 'send' menu to make it discoverable"

(There's something funny going on with the menu item hiding code

This reverts commit 71bec832c0d9eb518f62108048ab81efe16e0ffe.
4.508 changelog update
Bumped manifest to 4.508