[stable20] Fix mimetype and mindmap icon

[skjnldsv]

Signed-off-by: John Molakvoæ (skjnldsv) skjnldsv@protonmail.com

[nickvergessen]

There was 1 failure:

1) Test\IntegrityCheck\CheckerTest::testVerifyCoreSignatureWithModifiedMimetypelistSignatureData
Failed asserting that two arrays are identical.
--- Expected
+++ Actual
@@ @@
-Array &0 ()
+Array &0 (
+    'FILE_MISSING' => Array &1 (
+        'mimetypelist.js' => Array &2 (
+            'expected' => 'dc48de7ad4baa030c5e563350c9a80b274bad783f6f5adbf1595ecef6c6a32e52890a24cb26cddb0aa20193ba52c001150c68d8bfb567f0aed566f4029a190a3'
+            'current' => ''
+        )
+    )
+    'EXTRA_FILE' => Array &3 (
+        'core/js/mimetypelist.js' => Array &4 (
+            'expected' => ''
+            'current' => '23a3fa45757b26795f5cf8f94d9e5bce76fc916288a6458679311b312c167adcf4158ccb2c5c3db791fa0b87703b6c5863afb6c9d790b8cbac5ab3ae8c3418fb'
+        )
+    )
+)

/drone/src/tests/lib/IntegrityCheck/CheckerTest.php:1024

@skjnldsv

[blizzz]

closing for it won't make it into the next and last 20 release anymore.