[v1.51.0] UI polish

This release polishes different aspects of the UI. The main changes are to improve contrast in various parts of the app for both light and dark themes.

Full changelog

• Added a setting to disable the text preview icon for certain post feed views.
• Added support for haptic feedback on action buttons in the post feed/post screen.
• Added a setting to enable/disable haptic feedback.
• Fixed a bug where shadow is cut off from the link button in a post.
• Experimental: Added special support for loops.video links.
• Improved the contrast for the search bar in light themes.
• Changed some image thumbnails to be rounded and also have a slight border for contrast.