Remove references to default theme

Bug 1465107: Use Bootstrap CSS Framework

Change-Id: I2b5928352dc8675162e6f5e00b3424b82456e382

htdocs/init.php

@@ -331,12 +331,12 @@ if (!isset($CFG->noreplyaddress) && isset($CFG->wwwroot)) {
 if (!get_config('theme')) {
     // if it's not set, we're probably not installed,
     // so set it in $CFG directly rather than the db which doesn't yet exist
-    $CFG->theme = 'default';
+    $CFG->theme = 'raw';
 }
 
 if (defined('INSTALLER')) {
     // Custom themes sometimes cause upgrades to fail.
-    $CFG->theme = 'default';
+    $CFG->theme = 'raw';
 }
 
 // Make sure the search plugin is configured
@@ -412,7 +412,7 @@ try {
     $THEME   = new Theme($USER);
 } catch (SystemException $exception) {
     // set the theme to 'default' and put up an error message
-    $THEME = new Theme('default');
+    $THEME = new Theme('raw');
     $SESSION->add_error_msg($exception->getMessage());
 }