feat: nicer smart filters & folders theme (#795)

* fix: color add button and drop

* fix: color scrollbars

* fix: remove infinite scroll and fix scrollbars

* fix: plus icon center

* fix: navigation padding, structure simplif and naming

* fix: simplify scrollbars

* fix: scroll bar simplif + scheme in macos

* fix: magic variables to const

* refactor: extract panel ref state

* refactor: remove dead code, simple macos theme

app/assets/javascripts/app.ts

@@ -58,7 +58,6 @@ import {
   delayHide,
   elemReady,
   fileChange,
-  infiniteScroll,
   lowercase,
   selectOnFocus,
   snEnter,
@@ -150,7 +149,6 @@ const startApplication: StartApplication = async function startApplication(
     .directive('delayHide', delayHide)
     .directive('elemReady', elemReady)
     .directive('fileChange', fileChange)
-    .directive('infiniteScroll', [infiniteScroll])
     .directive('lowercase', lowercase)
     .directive('selectOnFocus', ['$window', selectOnFocus])
     .directive('snEnter', snEnter);