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

resources/views/form/user-select.blade.php

@@ -0,0 +1,34 @@
+<div class="dropdown-search custom-select-input" components="dropdown dropdown-search user-select"
+     option:dropdown-search:url="/search/users/select"
+>
+    <input refs="user-select@input" type="hidden" name="{{ $name }}" value="{{ $user->id ?? '' }}">
+    <div refs="dropdown@toggle"
+         class="dropdown-search-toggle {{ $compact ? 'compact' : '' }} flex-container-row items-center"
+         aria-haspopup="true" aria-expanded="false" tabindex="0">
+        <div refs="user-select@user-info" class="flex-container-row items-center px-s">
+            @if($user)
+                <img class="avatar small mr-m" src="{{ $user->getAvatar($compact ? 22 : 30) }}" alt="{{ $user->name }}">
+                <span>{{ $user->name }}</span>
+            @else
+                <span>{{ trans('settings.users_none_selected') }}</span>
+            @endif
+        </div>
+        <span style="font-size: {{ $compact ? '1.15rem' : '1.5rem' }}; margin-left: auto;">
+            @icon('caret-down')
+        </span>
+    </div>
+    <div refs="dropdown@menu" class="dropdown-search-dropdown card" role="menu">
+        <div class="dropdown-search-search">
+            @icon('search')
+            <input refs="dropdown-search@searchInput"
+                   aria-label="{{ trans('common.search') }}"
+                   autocomplete="off"
+                   placeholder="{{ trans('common.search') }}"
+                   type="text">
+        </div>
+        <div refs="dropdown-search@loading" class="text-center">
+            @include('common.loading-icon')
+        </div>
+        <div refs="dropdown-search@listContainer" class="dropdown-search-list"></div>
+    </div>
+</div>