Merge branch '3.4' into 4.0

* 3.4:
  [WebProfilerBundle] Fix Debug toolbar breaks app
  Use fill instead of style for svg colors
  bumped Symfony version to 3.4.6
  updated VERSION for 3.4.5
  updated CHANGELOG for 3.4.5
  bumped Symfony version to 2.8.36
  updated VERSION for 2.8.35
  updated CHANGELOG for 2.8.35
  [FrameworkBundle] Silence "Failed to remove directory" on cache:clear
  bumped Symfony version to 2.7.43
  updated VERSION for 2.7.42
  update CONTRIBUTORS for 2.7.42
  updated CHANGELOG for 2.7.42

Author: nicolas-grekas

Command/CacheClearCommand.php

@@ -130,7 +130,9 @@ protected function execute(InputInterface $input, OutputInterface $output)
         try {
             $fs->remove($oldCacheDir);
         } catch (IOException $e) {
-            $io->warning($e->getMessage());
+            if ($output->isVerbose()) {
+                $io->warning($e->getMessage());
+            }
         }
 
         if ($output->isVerbose()) {