Database connectors: Switch default sqlite variant to sqlite_v2

Cargo.toml

@@ -13,10 +13,10 @@ license = "LGPL-3.0"
 [features]
 rusqlite_old = ["rusqlite"]
 rusqlite_new = ["rusqlite"]
-default  = ["rusqlite_old"]
-complete = ["rusqlite_old", "postgres", "webbrowser"]
-server   = ["rusqlite_old", "postgres"]
-desktop  = ["rusqlite_old", "webbrowser"]
+default  = ["rusqlite_new"]
+complete = ["rusqlite_new", "postgres", "webbrowser"]
+server   = ["rusqlite_new", "postgres"]
+desktop  = ["rusqlite_new", "webbrowser"]
 watch    = ["handlebars-iron/watch"]
 strict   = [] # Treat warnings as a build error
 debug    = []