add an option to display units for the options textbox

src/gui/options.js

@@ -68,10 +68,14 @@ App.UI.OptionsGroup = (function() {
 			}
 
 			/**
+			 * @param {string} [unit]
 			 * @returns {Option}
 			 */
-			showTextBox() {
+			showTextBox(unit) {
 				this.textbox = true;
+				if (unit) {
+					this.unit = unit;
+				}
 				return this;
 			}
 
@@ -256,6 +260,9 @@ App.UI.OptionsGroup = (function() {
 							textbox.classList.add("number");
 						}
 						buttonGroup.append(textbox);
+						if (option.unit) {
+							buttonGroup.append(" ", option.unit);
+						}
 					}
 					if (option.comment) {
 						const comment = document.createElement("span");
@@ -264,7 +271,6 @@ App.UI.OptionsGroup = (function() {
 						buttonGroup.append(comment);
 					}
 					container.append(buttonGroup);
-
 				}
 
 				return container;