Fix hover style under the Builder Widgets

[Tshepiso-R]

1. Data Entry Group: Hover Style

• Issue: The top corners of the Data Entry group are not rounded when hovered, resulting in inconsistency with the panel design.
• Expected Behavior: Apply rounded corners to the top corners only on hover to match the panel's design.

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2. Data Section: Panel Header Styling

• Issue:
  • The panel header's top corners lack rounded borders when hovered, causing inconsistency.
  • The bottom corners incorrectly display a border-radius when expanded, which is unnecessary.
• Expected Behavior:
  • Add rounded corners to the top corners only to align with the panel design.
  • Remove border-radius styling from the bottom corners upon expansion.

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3. Last Group: Hover Background Color

• Issue: When hovering over the last group, the background color does not extend to the edges of the bottom corners.
• Expected Behavior:
  • Ensure the hover background color fills the entire area, including the bottom corners.