refactor(*): Used str.format and str.format_map in all widgets to insert values in labels

[GhostOps77]

The old PR (#498) was not rebased properly. So, made a new one.

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The earlier code used str.replace method to replace each placeholder in the labels with their values. This can be done by str.format and str.format_map methods. This will make the job easier to insert values.

So, instead of doing something like this

label_values = {
    "icon": icon,
    "data": data
}

for key, value in label_values:
    formatted_text = part.replace('{' + key + '}', value) 

This can be done like this

formatted_text = part.format(icon=icon, data=data)

or like this

formatted_text = part.format_map(label_values)

This is how it was done in this PR.