fix: add slider if stepper overflows

Signed-off-by: Federico Morreale <frc.morreale@gmail.com>

.changeset/perfect-crabs-help.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-scaffolder-react': patch
+---
+
+Add horizontal slider if stepper overflows

plugins/scaffolder-react/src/next/components/Stepper/Stepper.tsx

@@ -190,7 +190,12 @@ export const Stepper = (stepperProps: StepperProps) => {
   return (
     <>
       {isValidating && <LinearProgress variant="indeterminate" />}
-      <MuiStepper activeStep={activeStep} alternativeLabel variant="elevation">
+      <MuiStepper
+        activeStep={activeStep}
+        alternativeLabel
+        variant="elevation"
+        style={{ overflowX: 'auto' }}
+      >
         {steps.map((step, index) => {
           const isAllowedLabelClick = activeStep > index;
           return (

plugins/scaffolder-react/src/next/components/TaskSteps/TaskSteps.tsx

@@ -58,6 +58,7 @@ export const TaskSteps = (props: TaskStepsProps) => {
           activeStep={props.activeStep}
           alternativeLabel
           variant="elevation"
+          style={{ overflowX: 'auto' }}
         >
           {props.steps.map(step => {
             const isCompleted = step.status === 'completed';