"Select All" and "Cancel All" options

Whenever I create a custom component, I like to choose the entire CSS file. I don't like to add styles one by one, so every time I have to deselect one by one, I feel that it wastes my time. Can I add "Select All" and "Cancel All" above or below the style list. Option, I think it will save me a lot of work.

----Sorry, I don't know English, the above translation from Google. Thank you

How to update custom components

+100000000000 This was suggested by me I believe, quite some time ago actually. Was hoping to have seen this long before now :/

I don't understand what the op exactly means. If he is asking for a way of selecting a bunch of components then you can use Ctrl+LMB or Shift+LMB in the overview panel.