Web: Login: disable with error

web/ASC.Web.Login/src/Login.jsx

@@ -500,7 +500,7 @@ const Form = (props) => {
                   : t("Common:LoginButton")
               }
               tabIndex={1}
-              isDisabled={isLoading}
+              isDisabled={isLoading || !identifierValid || !passwordValid}
               isLoading={isLoading}
               onClick={onSubmit}
             />

web/ASC.Web.Login/src/RoomsLogin.jsx

@@ -359,7 +359,7 @@ const Form = (props) => {
                 scale={true}
                 isAutoFocussed={true}
                 tabIndex={1}
-                isDisabled={isLoading}
+                isDisabled={isLoading || !identifierValid}
                 autoComplete="username"
                 onChange={onChangeLogin}
                 onValidateInput={onValidateEmail}