Planet mining settings interface

* Modified owned planet view to include a field which indicates whether
mining settings are specific to the planet or come from the empire;
modified "simple" game components accordingly

* Modified stored procedures to only allow planet-specific mining
settings updates when the planet actually uses planet-specific settings,
and added a stored procedure which toggles the source of a planet's
settings

* Added corresponding parts to mining settings DAO and resources
controller

* Added session commands and server command handlers that toggle the
source of the settings and that upload the settings

* Split planet page template into multiple files for clarity and added
the mining priorities form to the natural resources tab

legacyworlds-server-data/db-structure/tests/user/040-functions/045-empire-mining/040-mset-toggle-source.sql

@@ -0,0 +1,15 @@
+/*
+ * Test privileges on emp.mset_toggle_source( INT , INT )
+ */
+BEGIN;
+	SELECT emp.mset_update_start( 1 );
+
+	SELECT plan( 1 );
+	
+	SELECT diag_test_name( 'emp.mset_toggle_source() - Privileges' );
+	SELECT lives_ok( $$
+			SELECT emp.mset_toggle_source( 1 , 1 )
+		$$ );
+	
+	SELECT * FROM finish( );
+ROLLBACK;