UX polish and refactor

- Visual polish for the settings page, keyboard shortcuts page, and outdenting tooltip
- Tweak copy throughout the app to make it a little simpler
- Add the ability to fetch the name of the meta key (i.e. Cmd or Ctrl) so it can be displayed to the user
- Make it possible to Cancel out of editing a keyboard shortcut, rather than the only option being to Save

src/main/frontend/ui.css

@@ -85,7 +85,7 @@
 
     .panel-content {
       overflow-y: auto;
-      max-height: 80vh;
+      max-height: 85vh;
       max-width: 768px;
       padding: 2rem;
     }
@@ -134,6 +134,10 @@
       color: var(--ls-link-text-color);
     }
   }
+
+  &.p-1 {
+    padding: 0.25rem 0.5rem !important;
+  }
 }
 
 .dropdown-wrapper {