BUG-slider with labels=dict

[FredLL-Avaiga]

Description
When specifying a dict as value for the labels property of slider, the app crash

How to reproduce

slider_sel = "toto"
labels = {"toto": "label toto", "fred.png": "label png"}
num_labels = {str(x): f"Label {x}" for x in range (0, 101) if x % 25 == 0}

md = """
Demo Sliders with Labels as Dict

<|{slider_sel}|slider|lov=toto;tata;Fred;fred.png|labels={labels}|>

<|{slider_sel}|slider|labels={num_labels}|>
"""

Gui(md).run(use_reloader=False)

Expected behavior
No crash and the labels are shown

[FredLL-Avaiga]

This one is for you @mshell99