Changes:

• Account for color mode when determining brightness slider (#1564)
• Prevent saving and rendering blank template widgets (#1562)
• Prevent selecting an entity if they are missing (#1557)
• Only show widget errors when selected, other widget fixes (#1555)
• Register sensor names as English only (#1552)
• Bump some app dependencies (#1551)
• Catch a tile crash and add a null check (#1548)