Patch Bug that prevents loading ts_library.json fields ids as integers

[Loran425]

TagStudio/tagstudio/src/core/library.py

Lines 690 to 699 in 93177dd

	filename = entry.get('filename', '')
	e_path = entry.get('path', '')
	fields = []
	if 'fields' in entry:
	# Cast JSON str keys to ints
	for f in fields:
	f[int(list(f.keys())[0])
	] = f[list(f.keys())[0]]
	del f[list(f.keys())[0]]
	fields = entry['fields']

causes fields to load into memory as list[dict[str,list[int]]] instead of list[dict[int,list[int]]]

This causes #93 and leads to unintended cases of #92

Fixes #93