form improvements

resources/views/form/_help.blade.php

@@ -1,6 +1,6 @@
 <div class="col-md-1 pl-0">
   @if($w->help)
-    <i class="fa-question-circle"
+    <i class="fa-question-circle form-help"
        data-toggle="tooltip"
        data-placement="right"
        @if(false!==strpos($w->help, '<'))

resources/views/form/checkbox.blade.php

@@ -0,0 +1,22 @@
+@php
+/** @var \App\View\Widget $w */
+@endphp
+
+<div class="row form-group">
+  <div class="col-md-{{$w->fieldCols}} offset-md-{{$w->labelCols}}">
+    <div class="custom-control custom-checkbox{{ $errors->has($w->name) ? ' is-invalid' : '' }}">
+      <input type="checkbox" class="custom-control-input"
+             id="field-{{ $w->name }}"
+             {{+$w->value?'checked':''}}
+             name="{{ $w->name }}">
+      <label class="custom-control-label" for="field-{{ $w->name }}">{{ $w->label }}</label>
+    </div>
+
+    @if ($errors->has($w->name))
+      <span class="invalid-feedback" role="alert">
+        <strong>{{ $errors->first($w->name) }}</strong>
+      </span>
+    @endif
+  </div>
+  @include('form._help')
+</div>

resources/views/form/input.blade.php

@@ -3,8 +3,8 @@
 @endphp
 
 <div class="row form-group">
-  <label for="field-{{ $w->name }}" class="col-md-3 col-form-label text-md-right">{{ $w->label }}</label>
-  <div class="col-md-8 pl-0">
+  <label for="field-{{ $w->name }}" class="col-md-{{$w->labelCols}} col-form-label text-md-right">{{ $w->label }}</label>
+  <div class="col-md-{{$w->fieldCols}}">
     <input id="field-{{ $w->name }}"
            name="{{ $w->name }}"
            class="form-control{{ $errors->has($w->name) ? ' is-invalid' : '' }}"

resources/views/form/textarea.blade.php

@@ -3,8 +3,8 @@
 @endphp
 
 <div class="row form-group">
-  <label for="field-{{ $w->name }}" class="col-md-3 col-form-label text-md-right">{{ $w->label }}</label>
-  <div class="col-md-8 pl-0">
+  <label for="field-{{ $w->name }}" class="col-md-{{$w->labelCols}} col-form-label text-md-right">{{ $w->label }}</label>
+  <div class="col-md-{{$w->fieldCols}}">
     <textarea id="field-{{ $w->name }}"
               name="{{ $w->name }}"
               class="form-control{{ $errors->has($w->name) ? ' is-invalid' : '' }}"