Settings UI Improvements

[bitmold]

• all preferences for setting a port use inputType="number" on their EditTextPreference now.
• the proxy password EditTextPreference uses inputType="password" to give it dingbats
• minor ui string updates on this screen:
  • socks4/5 --> SOCKS4/5
  • all preference summaries have similar capitalization
  • aLocCat --> aLogcat

One thing I would have liked to change but did not is the EditTextPreference for proxy type. The user is supposed to enter one of {HTTP, HTTPS, SOCKS4, SOCKS5} but they can enter anything. It would make sense here to use a ListPreference instead of an EditTextPreference, however I did not make the change to one because user preference data could be lost when users update the app.

For example, if the entriesValue set for the ListPreference is {"http", "https", "socks4", "socks5"} and a user had previously configured the preference "pref_proxy_type" with the EditTextPreference to "HTTP" (instead of "http"), the ListPreference would be set to no value. It's particularly unfortunate, because we don't even care about the casing of the proxy type.