[Web] Fixes for BCC map input fields

[Web] Allow to edit alias address
[Web] $_SESSION['return'] now contains arrays and allows multiple returned messages and log entries
[Web] Some language string changes
[Web] General SQL exception handler, remove all try catch handlers
[Web] Alias table now has an ID as primary key
[Web] Be more aggressive with localStorage cleaning

data/web/inc/prerequisites.inc.php

@@ -51,6 +51,25 @@ catch (PDOException $e) {
 <?php
 exit;
 }
+function pdo_exception_handler($e) {
+    if ($e instanceof PDOException) {
+      $_SESSION['return'][] = array(
+        'type' => 'danger',
+        'log' => array(__FUNCTION__),
+        'msg' => array('mysql_error', $e)
+      );
+      return false;
+    }
+    else {
+      $_SESSION['return'][] = array(
+        'type' => 'danger',
+        'log' => array(__FUNCTION__),
+        'msg' => array('mysql_error', 'unknown error')
+      );
+      return false;
+    }
+}
+set_exception_handler('pdo_exception_handler');
 
 // TODO: Move function
 function get_remote_ip($anonymize = null) {