Merge pull request #3344 from overleaf/jpa-mtx-is-editable

[misc] .mtx files are editable text files

GitOrigin-RevId: e1a8363e24d961d9723439c68d308fb69f59bbd3

services/web/app/src/Features/Uploads/FileTypeManager.js

@@ -14,6 +14,7 @@ const FileTypeManager = {
     '.bibtex',
     '.txt',
     '.tikz',
+    '.mtx',
     '.rtex',
     '.md',
     '.asy',

services/web/frontend/js/ide/binary-files/controllers/BinaryFileController.js

@@ -26,6 +26,7 @@ export default App.controller('BinaryFileController', function(
     'bibtex',
     'txt',
     'tikz',
+    'mtx',
     'rtex',
     'md',
     'asy',