Happy Elementor Addons Pro 2.15.0

- Fix: Advanced slider arrow according to vertical and horizontal slide.
- Fix: Advanced slider pagination bullets according to vertical and horizontal slide.
- Fix: Advanced slider scrollbar according to vertical and horizontal slide.
- Fix: Advanced slider ProgressBar according to vertical and horizontal slide.
- Fix: Advanced slider pagination numbers according to vertical and horizontal slide.
- Fix: Advanced slider responsive issue fix.
- Fix: Advanced slider compatibility with Elementor Improved Asset Loading.
- Fix: Grammatical Mistake in one page nav widget.
- Fix: Off-Canvas null Check.
- Fix: Modal popup null Check.
- Fix: Manual Selection query issue.
- Fix: HappyMenu flush rewrite issue.
- Fix: ListGroup Unindetified index error.
- Fix: ScrollImage Unindetified index error.

- Fix: Failed to open stream issue in particle feature
- Fix: Syntax error in unfold widget
- Fix: Hover Box default background image issue
- Fix: Preset reset button style issue
- Fix: Unfold widget JS corner case issue

- New: Unfold Widget.
- Tweak: Post Grid widget optimization
- Tweak: Single Product widget optimization
- Tweak: Product Grid widget optimization
- Tweak: Product Carousel widget optimization
- Tweak: Product Category Grid widget optimization
- Tweak: Product Category Carousel widget optimization
- Tweak: Replace `_content_template` function with `content_template`.