[Enhancement] [Metadata Utilities] Option to add prefixes for easy filtering and adding tags by prefix

[HerrKnarz]

• Listbox in settings to specify the default prefixes
• combobox on adding new items with the available prefixes
• search by prefix in metadata editor
• option to ignore prefixes when searching for matching items
• Maybe even split up prefix and name into separate columns to better sort them? Can exist besides the existing name column and maybe be hidden in the settings if not needed