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/custom-checkbox.blade.php

@@ -0,0 +1,13 @@
+{{--
+$name
+$value
+$checked
+$label
+--}}
+<label custom-checkbox class="toggle-switch @if($errors->has($name)) text-neg @endif">
+    <input type="checkbox" name="{{$name}}" value="{{ $value }}" @if($checked) checked="checked" @endif>
+    <span tabindex="0" role="checkbox"
+          aria-checked="{{ $checked ? 'true' : 'false' }}"
+          class="custom-checkbox text-primary">@icon('check')</span>
+    <span class="label">{{$label}}</span>
+</label>