Login: Honour root_url for Forget Password related links (#27368)

Closes #27226

public/app/core/components/ForgottenPassword/ForgottenPassword.tsx

@@ -4,6 +4,8 @@ import { getBackendSrv } from '@grafana/runtime';
 import { css } from 'emotion';
 import { GrafanaTheme } from '@grafana/data';
 
+import config from 'app/core/config';
+
 interface EmailDTO {
   userOrEmail: string;
 }
@@ -53,7 +55,7 @@ export const ForgottenPassword: FC = () => {
           </Field>
           <HorizontalGroup>
             <Button>Send reset email</Button>
-            <LinkButton variant="link" href="/login">
+            <LinkButton variant="link" href={`${config.appSubUrl}/login`}>
               Back to login
             </LinkButton>
           </HorizontalGroup>

public/app/core/components/Login/LoginPage.tsx

@@ -12,6 +12,8 @@ import { Branding } from 'app/core/components/Branding/Branding';
 import { HorizontalGroup, LinkButton } from '@grafana/ui';
 import { LoginLayout, InnerBox } from './LoginLayout';
 
+import config from 'app/core/config';
+
 const forgottenPasswordStyles = css`
   padding: 0;
   margin-top: 4px;
@@ -51,7 +53,7 @@ export const LoginPage: FC = () => {
                           <LinkButton
                             className={forgottenPasswordStyles}
                             variant="link"
-                            href="/user/password/send-reset-email"
+                            href={`${config.appSubUrl}/user/password/send-reset-email`}
                           >
                             Forgot your password?
                           </LinkButton>