Reset the button border and padding on .form-help (#3107)

.changeset/fix-form-help-button-border.md

@@ -0,0 +1,5 @@
+---
+"@tabler/core": patch
+---
+
+Fixed the default browser border and padding on `.form-help` when it is a `<button>`.

core/scss/ui/_forms.scss

@@ -128,6 +128,8 @@ Form help
   justify-content: center;
   width: var(--form-help-size);
   height: var(--form-help-size);
+  // `.form-help` is often a `<button>`: drop the user agent's padding and border
+  padding: 0;
   font-size: var(--form-help-font-size);
   font-weight: var(--font-weight-semibold);
   color: $form-secondary-color;
@@ -136,6 +138,7 @@ Form help
   cursor: pointer;
   user-select: none;
   background: var(--gray-100);
+  border: 0;
   @include border-radius(var(--border-radius-pill));
   @include transition(background-color $transition-time, color $transition-time);