Browser Bookmarklet - Highlight mandatory fields on form (#1978)

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Fixed issues in code

Author: sumanthdosapati

Specialized Areas/Browser Bookmarklets/Highlight Mandatory fields on form/Highlight mandatory fields on form.js

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+## Highlight Mandatory Fields
+
+**Description**
+- This bookmarklet visually highlights all mandatory fields on a ServiceNow form by adding a glowing border or background around them.
+- It helps developers, admins, or QA testers quickly see which fields are marked as mandatory.
+- It also helps partial visually paired people to find the mandatory fields instead of looking for small * icon for field.
+- This works as a toggle. One click highlights the mandatory fields and clicking again removes the highlight.
+
+**Example :**
+
+- When activated on a form (e.g. Incident, Request Item):
+- Mandatory fields like Short description, Caller, etc get a soft glowing yellow border.
+- Click again → glow is removed.
+
+**How it works:**  
+- Detects `g_form` context.
+- Adds a temporary CSS class (`.mandatory-glow`) to all mandatory fields.
+- Click again to remove the highlights.
+
+**Sample screenshot**
+<img width="1882" height="674" alt="image" src="https://github.com/user-attachments/assets/1320c9c3-976d-4bf0-92d5-e051825dbe6c" />
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