Fix UI inconsistencies, various improvements (#357)

* Make version gray in plugin list

* Settings/store icons together & plugin list fix

* Navigation name/icon improvements

* Decky settings overhaul and other fixes

- Revert the tab icon to a plug
- Rename DeckyFlat function to DeckyIcon
- Add DialogBody to settings pages to improve scrolling
- Add remote debugging settings to the developer settings
- Fix React devtools interactions to work more easily
- Add spacing to React devtools description
- Specify Decky vs. plugin store
- Compact version information by update button
- Add current version to bottom of settings
- Remove unnecessary settings icons
- Change CEF debugger icon to Chrome (bug icon too generic, is Chromium)
- Make buttons/dropdowns in settings have fixed width
- Make download icon act/appear similar to Valve's for Deck

* Final UI adjustments

* Switch plugin settings icon to plug

frontend/src/components/settings/pages/general/BranchSelect.tsx

@@ -19,7 +19,7 @@ const BranchSelect: FunctionComponent<{}> = () => {
   return (
     // Returns numerical values from 0 to 2 (with current branch setup as of 8/28/22)
     // 0 being stable, 1 being pre-release and 2 being nightly
-    <Field label="Update Channel">
+    <Field label="Decky Update Channel" childrenContainerWidth={'fixed'}>
       <Dropdown
         rgOptions={Object.values(UpdateBranch)
           .filter((branch) => typeof branch == 'string')