added error message when clicking on switch

[yosrinajar]

Description

when you want to enable/disable a product in product category, an error message appears to tell you that you can only modify using edit form.

Steps to Test

1.Login 2.Go to "products category" section

3. Add new product category, if you don't already have one here is how you do it: 3.a Click on "Add new product category" 3.b Fill out the fields
4. Click on the switch button under 'enable'

Screenshots (if applicable)

Checklist

• [x] I have tested these changes
• [x] I have updated the relevant documentation
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the codebase
• [x] The title of my pull request is clear and descriptive
• [x] My changes generate no new warnings or errors