Improving formItem mixin and form dialog component behavior

Packages/ohif-core/client/components/base/templates/button.html

@@ -4,6 +4,7 @@
         class="{{this.class}}"
         disabled="{{#if this.disabled}}disabled{{/if}}"
         title="{{this.title}}"
+        type="{{this.type}}"
         {{this.tagAttributes}}
     >
         {{>UI.contentBlock}}