Move border-radius mixin from scss/_mixins.scss to scss/mixins/_border-radius.scss

Reunites the family.
Closes #17791

docs/components/forms.md

@@ -535,7 +535,7 @@ Block help text—for below inputs or for longer lines of help text—can be eas
 
 ## Validation
 
-Bootstrap includes validation styles for error, warning, and success states on form controls. To use, add `.has-warning`, `.has-error`, or `.has-success` to the parent element. Any `.form-control-label`, `.form-control`, and `.text-help` within that element will receive the validation styles.
+Bootstrap includes validation styles for error, warning, and success states on form controls. To use, add `.has-warning`, `.has-danger`, or `.has-success` to the parent element. Any `.form-control-label`, `.form-control`, and `.text-help` within that element will receive the validation styles.
 
 {% comment %}
 {% callout warning %}
@@ -556,7 +556,7 @@ Ensure that an alternative indication of state is also provided. For instance, y
   <label class="form-control-label" for="inputWarning1">Input with warning</label>
   <input type="text" class="form-control form-control-warning" id="inputWarning1">
 </div>
-<div class="form-group has-error">
+<div class="form-group has-danger">
   <label class="form-control-label" for="inputError1">Input with error</label>
   <input type="text" class="form-control form-control-error" id="inputError1">
 </div>
@@ -577,7 +577,7 @@ Ensure that an alternative indication of state is also provided. For instance, y
     </label>
   </div>
 </div>
-<div class="has-error">
+<div class="has-danger">
   <div class="checkbox">
     <label>
       <input type="checkbox" id="checkboxError" value="option1">

scss/_forms.scss

@@ -283,7 +283,7 @@ input[type="checkbox"] {
   }
 }
 
-.has-error {
+.has-danger {
   @include form-control-validation($brand-danger);
 
   .form-control-error {
@@ -352,7 +352,7 @@ input[type="checkbox"] {
 // .has-warning {
 //   @include form-control-validation($state-warning-text, $state-warning-text, $state-warning-bg);
 // }
-// .has-error {
+// .has-danger {
 //   @include form-control-validation($state-danger-text, $state-danger-text, $state-danger-bg);
 // }
 //

scss/_variables.scss

@@ -297,7 +297,7 @@ $cursor-disabled:                not-allowed !default;
 // Form validation icons
 $form-icon-success: "data:image/svg+xml;base64,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" !default;
 $form-icon-warning: "data:image/svg+xml;base64,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" !default;
-$form-icon-error: "data:image/svg+xml;base64,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" !default;
+$form-icon-danger: "data:image/svg+xml;base64,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" !default;
 
 
 // Dropdowns