Small CSS tweak to embiggen some troublesome touch targets

Fixes #558

Fixes #525

Fixes #579
Orange shouldn't have advanced login
Leaving Android 2.3 behind

Finally
iOS doesn't need a specific version
Last css tweak for the right button on shares
Use plain (bootstrap/zepto) ajax XHR when doing the server probe.
Ensure the right respective ajax method for server probe vs regular login.
Template optimization
Merge pull request #583 from SpiderOak/confirm-server-with-plain-xhr

Confirm server with plain xhr
Merge branch 'master' of https://github.com/SpiderOak/SpiderOakMobileClient
Check for missing username or password before even hitting the server

Fixes #584
Oopps. Might wanna wait till the vars exist before testing them.
Also need to wait before blocking the screen
pre ZK warning and a blur I have been meaning to add
Merge pull request #585 from SpiderOak/issue-584-missing-username-or-password

Check for missing username or password before even hitting the server
Merge branch 'master' into issue-537-filenames-with-colons-merge

Conflicts:
	tpl/deviceViewTemplate.html
	tpl/fileItemDetailsViewTemplate.html
	tpl/fileItemViewMinTemplate.html
	tpl/fileItemViewTemplate.html
	tpl/folderItemViewTemplate.html
	tpl/progressDialog.html
	tpl/shareItemDetailsViewTemplate.html
	tpl/shareRoomItemViewTemplate.html