Lexical Fixes for v25.05.1

[ssddanbrown]

For #5631

• Fixed tiny image resize square on image insert.
• Updated table resize handles to be more efficient, and prevented them wondering far away from tables so often.
• Fixed table resize handles overlapping table captions.
• Fixed text formatting being inconsistent on new paragraphs.
• Updated media resize handling to be more reliable and to retain focus after resize.
• Added toolbar for media element for easier menu access.
• Fixed buggy media selection scenarios.
• Fixed media form "src" field not working when video is using source elements.
• Updated media embed code field to show existing embed code for direct editing.