Improve CopyResult function and add new i18n

[ungjinPark]

bug fix for 3.4.0 copy result function

• save button now saves customized copy result to store.

What's new?

• i18n
  • i18n strings for copy results section of the preferences window has added.
• add new feature for copy results: Reset button
  • it applies users can recovery the customized format to default format just one click.
• Development
  • in a preferences.js file, config.i18n.preferences object no longer passed to 'translateHTML' function. config.i18n will be passed.
  • I've started to add comments for some codes from today, I will adding it continuously sometimes when possible. jsDocs and normal comments have added first in a 'preferences.js' file.
• Style
  • "color-scheme" property is now applied for all control elements. it may change the colours of controls(links, checkboxes, radio, text field, textarea, etc) more appropriately with your application theme preferences. no longer light-gray scrollbar won't be appeared in dark mode.