Add license requirement

public/options/options.css

@@ -317,6 +317,10 @@ input[type='number'] {
     color: grey;
 }
 
+tr.disabled {
+    opacity: 0.3;
+}
+
 #options {
     height: 100vh;
     flex-basis: 80%;
@@ -678,4 +682,9 @@ svg {
     #options > div {
         max-width: 100%;
     }
+}
+
+.upsellButton {
+    cursor: pointer;
+    vertical-align: middle;
 }

public/options/options.html

@@ -302,6 +302,18 @@
 					</div>
 				</div>
 
+				<div data-type="toggle" data-toggle-type="reverse" data-sync="showUpsells" data-no-safari="true">
+					<div class="switch-container">
+						<label class="switch">
+							<input id="showUpsell" type="checkbox" checked>
+							<span class="slider round"></span>
+						</label>
+						<label class="switch-label" for="showUpsells">
+							__MSG_hideUpsells__
+						</label>
+					</div>
+				</div>
+
 			</div>
 
 			<div id="keybinds" class="option-group hidden">