feat: 🎸 Update hotkeys and user preferences modal (#1135)

* feat: 🎸 Update hotkeys and user preferences modal

This feature fix incompatibility with existent hotkeys component and
adds user preferences modal back

Closes: #923

* Update preferences structure in store

* Hide window level section of user preferences

* Update modal to reflect current hotkey value

* Clone object with hotkeys before passing to manager

* CR Update: Extract hotkeys manager format code to manager

* Fix broken cypress test

* Use new modal provider

* Rename hotkeyDefinitions in hotkeyspreferences and use array as representation

* Update study test and remove unused styles

platform/ui/src/components/userPreferencesForm/UserPreferencesForm.styl

@@ -0,0 +1,24 @@
+@import './../../design/styles/common/navbar.styl'
+@import './../../design/styles/common/global.styl'
+@import './../../design/styles/common/modal.styl'
+@import './../../design/styles/common/button.styl'
+
+.close
+  float: right;
+  font-size: 21px;
+  font-weight: 700;
+  line-height: 1;
+  color: #000;
+  text-shadow: 0 1px 0 #fff;
+  opacity: .2;
+
+.UserPreferencesForm
+  .footer
+    display: flex
+    flex-direction: row
+    padding-bottom: 20px
+    justify-content: space-between
+
+    div
+      button:last-child
+        margin-left: 10px