For each locale, programmatically migrated what we can from
torlauncher.properties and removed colon [:：] characters from field
label strings.

Version bump

Adds several new strings for the about:preferences#tor page. Not
quite complete and a few tedious things to do:

  - Remove the colon (':') character from several strings
    (Username, Password, Port, etc) to match style of existing
    fields in about:preferences
  - Duplicate some existing strings living in torlauncher.properties
    over to network-settings.dtd

Version bump

On macOS, remove the old meek and moat http helper browser profiles
that may be present under TorBrowser-Data/Tor/PluggableTransports/.
Removal is only attempted once; this is controlled by the Boolean pref
extensions.torlauncher.should_remove_meek_helper_profiles.

Version bump