Additions

• Added a rotating splash screen image in preparation for user-provided images (later).

Fixes

• Fixed an issue that would let SGPro save a sequence without a file extension.
• Fixed an issue where a rotation without verification will perform a mechanical rotation (PA) and not a sky angle rotation.
• Fixed an issue where default target settings would not be applied.
• Fixed an issue where the light theme drop down menus might have gray background with black text.