Reorgranised blade view files to form a convention

- Primarily moved and re-organised view files.
- Included readme within views to document the convention.
- Fixed some issues with page field select list in previous commit.
- Tweaked some route names while going through.
- Split some views out further.

Closes #2805

app/Http/Controllers/Images/DrawioImageController.php

@@ -30,7 +30,7 @@ class DrawioImageController extends Controller
 
         $imgData = $this->imageRepo->getEntityFiltered('drawio', $parentTypeFilter, $page, 24, $uploadedToFilter, $searchTerm);
 
-        return view('components.image-manager-list', [
+        return view('pages.parts.image-manager-list', [
             'images'  => $imgData['images'],
             'hasMore' => $imgData['has_more'],
         ]);