Release Behind The Overlay Revival v1.8.0

LICENSE:

• Updated LICENSE file.

README:

• Updated README and BOR images.

WebExtension:

• Updated WebExtension functionality.
• Recovered oldest project logo (Sorry!).
• Replaced PNG with SVG icons.
• Replaced browserAction with pageAction.
• Removed context menu support (useless right now).
• Removed unnecessary files.

Translations:

• Updated translation files.
• Replaced useless messages strings.
• Added translation support to overlay_remover.js.