On init, plugins are no longer marked as dummies.

A check for record count in plugins' TES4 headers could tell us if they
are or not without requiring the whole plugin to be read.

src/backend/json.h

@@ -61,6 +61,7 @@ namespace loot {
             boost::replace_all(json, ": \"true\"", ": true");
             boost::replace_all(json, ": \"false\"", ": false");
             boost::replace_all(json, ": \"null\"", ": null");
+            //boost::replace_all(json, ": ~", ": null");
 
             // Using the definition at <http://www.json.org/>.
             std::regex numbers(": \"(-?(?:0|[1-9]\\d*)(?:\\.\\d+)?(?:[eE][+-]?\\d+)?)\"", std::regex::ECMAScript);

src/gui/handler.cpp

@@ -220,7 +220,7 @@ namespace loot {
             YAML::Node pluginNode;
             pluginNode["name"] = plugin.second.Name();
             pluginNode["isActive"] = g_app_state.CurrentGame().IsActive(plugin.first);
-            pluginNode["isDummy"] = (plugin.second.FormIDs().size() == 0);
+            pluginNode["isDummy"] = false; // Set to false for now because null is a bit iffy and we just don't know yet. Although, we could read the record count from the TES4 header... Usual check is (plugin.second.FormIDs().size() == 0);
             pluginNode["loadsBSA"] = plugin.second.LoadsBSA(g_app_state.CurrentGame());
             pluginNode["crc"] = IntToHexString(plugin.second.Crc());
             pluginNode["version"] = plugin.second.Version();