Auto-fixes: UX Improvements (#2077)

* Whitelist `conversation_search_view` for ESLint

* Autofix `conversation_search_view`

* Remove Vim modeline

* Whitelist globals for ESLint

* Ignore unnamed module IIFE

* Whitelist legacy `then` expressions

* Extract `isSearchable`

Fixes line length violations.

* Remove unused constant

* Remove unnecessary escaping for parens

Suggested by ESLint `no-useless-escape` rule.

* 🎨 Organize file list

* Whitelist `inbox_view` for ESLint

* Autofix `inbox_view`

* Remove Vim modeline

* Add function names

* Whitelist globals for ESLint

* Fix lint errors

* 🔤 `options` properties

* 🎨 Improve `then` chain formatting

* Consider `js/*.js` files as scripts not modules

Forces use of 'use strict' directive per ESLint.

* Ignore unnamed module IIFE

* Fix function argument line breaks

js/modules/.eslintrc

@@ -6,5 +6,8 @@
   },
   "globals": {
     "console": true
+  },
+  "parserOptions": {
+    "sourceType": "module"
   }
 }