v1.5.43 — Bug fixes: font selector, social icons, Default Settings modal

What's Fixed

• Font selector: dropdown was showing both the native <select> and the raw options list simultaneously (wrong CSS class names) — now uses the correct custom-select structure
• Social media icons: were rendering as egg/oval shapes instead of circles — fixed with display:inline-block + overflow:hidden and SVG centred via calculated margin
• Default Settings modal: primary colour picker and font selector moved from toolbar bar into a proper modal (the old bar had a white background in the dark admin theme); access via the ⚙ Default Settings button
• Section Builder spacing: "Standard Templates" heading was touching the last saved template card — added missing bottom margin to the saved-templates container