make some css class names more generic

src/views/create-account-view.jsx

@@ -70,7 +70,7 @@ export default class CreateAccountView extends React.PureComponent {
   }
 
   render() {
-    let submitClasses = 'blue';
+    let submitClasses = 'primary';
     if (this.props.disabled) {
       submitClasses += ' disabled';
     }

src/views/login-view.jsx

@@ -42,7 +42,7 @@ export default class LoginView extends React.Component {
   }
 
   render() {
-    var submitClasses = 'blue';
+    let submitClasses = 'primary';
     if (this.props.disabled) {
       submitClasses += ' disabled';
     }

src/views/password-reset-view.jsx

@@ -75,7 +75,7 @@ export default class PasswordResetView extends React.PureComponent {
           </>
         }
         <div className="dialog-buttons">
-          <button className="blue" type="submit">{reset ?
+          <button className="primary" type="submit">{reset ?
             <FormattedMessage id="button_reset" defaultMessage="Reset" description="Button [Reset]" /> :
             <FormattedMessage id="button_send_request" defaultMessage="Send request"
               description="Button [Send request]" />

src/views/settings-view.jsx

@@ -73,7 +73,7 @@ export default class SettingsView extends React.PureComponent {
           </ul>
         </div>
         <div className="dialog-buttons">
-          <button type="submit" className="blue">
+          <button type="submit" className="primary">
             <FormattedMessage id="button_update" defaultMessage="Update"
               description="Button [Update]" />
           </button>

src/views/validation-view.jsx

@@ -78,10 +78,10 @@ class ValidationView extends React.PureComponent {
         }</FormattedMessage>
         </div>
         <div className="dialog-buttons">
-          <button className="blue" onClick={this.handleSubmit}>
+          <button className="primary" onClick={this.handleSubmit}>
             <FormattedMessage id="button_confirm" defaultMessage="Confirm" description="Button [Confirm]" />
           </button>
-          <button className="white" onClick={this.handleCancel}>
+          <button className="secondary" onClick={this.handleCancel}>
             <FormattedMessage id="button_cancel" defaultMessage="Cancel" description="Button [Cancel]" />
           </button>
         </div>