Minor tweaks

Gifski/AppDelegate.swift

@@ -32,7 +32,7 @@ final class AppDelegate: NSObject, NSApplicationDelegate {
 		NSApp.isAutomaticCustomizeTouchBarMenuItemEnabled = true
 		NSApp.servicesProvider = self
 
-		// Set launch completions option if the notification center could not be set up already
+		// Set launch completions option if the notification center could not be set up already.
 		LaunchCompletions.applicationDidLaunch()
 	}
 

Gifski/Constants.swift

@@ -1,7 +1,7 @@
 import Cocoa
 import Defaults
 
-struct Constants {
+enum Constants {
 	static let defaultWindowSize = CGSize(width: 360, height: 240)
 	static let backgroundImage = NSImage(named: "BackgroundImage")!
 	static let allowedFrameRate = 5.0...50.0

Gifski/EditVideoViewController.swift

@@ -293,7 +293,8 @@ final class EditVideoViewController: NSViewController {
 				NSAlert.showModal(
 					for: view.window,
 					message: "Animated GIF Limitation",
-					informativeText: "Exporting GIFs with a frame rate higher than 50 is not supported as browsers will throttle and play them at 10 FPS."
+					informativeText: "Exporting GIFs with a frame rate higher than 50 is not supported as browsers will throttle and play them at 10 FPS.",
+					defaultButtonIndex: -1
 				)
 			}
 		}
@@ -309,7 +310,8 @@ final class EditVideoViewController: NSViewController {
 				NSAlert.showModal(
 					for: view.window,
 					message: "Animated GIF Preview Limitation",
-					informativeText: "Due to a bug in the macOS GIF animation handling, the after-conversion preview and Quick Look may not loop as expected. The GIF will work properly in web browsers and other image viewing apps."
+					informativeText: "Due to a bug in the macOS GIF handling, the after-conversion preview and Quick Look may not loop as expected. The GIF will loop correctly in web browsers and other image viewing apps.",
+					defaultButtonIndex: -1
 				)
 			}
 		}
@@ -481,7 +483,7 @@ final class EditVideoViewController: NSViewController {
 		let gifski = Gifski()
 		self.gifski = gifski
 
-		setEstimatedFileSize(getNaiveEstimate().attributedString + "   Calculating Accurate Estimate…".attributedString.withColor(.secondaryLabelColor).withFontSize(NSFont.smallSystemFontSize.double))
+		setEstimatedFileSize(getNaiveEstimate().attributedString + "   Calculating Estimate…".attributedString.withColor(.secondaryLabelColor).withFontSize(NSFont.smallSystemFontSize.double))
 
 		gifski.run(conversionSettings, isEstimation: true) { [weak self] result in
 			guard let self = self else {

Gifski/MainWindowController.swift

@@ -29,7 +29,7 @@ final class MainWindowController: NSWindowController {
 			message: "Feedback Welcome 🙌🏻",
 			informativeText:
 				"""
-				If you have any feedback, bug reports, or feature requests, kindly use the “Send Feedback” button in the “Help” menu. We respond to all submissions. It's preferable that you report bugs this way rather than as an App Store review, since the App Store will not allow us to contact you for more information.
+				If you have any feedback, bug report, or feature request, there's a feedback button in the “Help” menu. We respond to all submissions.
 				""",
 			buttonTitles: [
 				"Get Started"

Gifski/Shared.swift

@@ -1,6 +1,6 @@
 import Foundation
 
-struct Shared {
+enum Shared {
 	static let appIdentifierPrefix = Bundle.main.infoDictionary!["AppIdentifierPrefix"] as! String
 	static let videoShareGroupIdentifier = "\(appIdentifierPrefix)gifski_video_share_group"
 }

Gifski/Utilities.swift

@@ -719,6 +719,7 @@ enum AVFormat: String {
 	case hevc
 	case h264
 	case av1
+	case vp9
 	case appleProResRAWHQ
 	case appleProResRAW
 	case appleProRes4444XQ
@@ -751,6 +752,8 @@ enum AVFormat: String {
 			self = .h264
 		case "av01":
 			self = .av1
+		case "vp09":
+			self = .vp9
 		case "aprh": // From https://avpres.net/Glossar/ProResRAW.html
 			self = .appleProResRAWHQ
 		case "aprn":
@@ -802,6 +805,8 @@ enum AVFormat: String {
 			return "avc1"
 		case .av1:
 			return "av01"
+		case .vp9:
+			return "vp09"
 		case .appleProResRAWHQ:
 			return "aprh"
 		case .appleProResRAW:
@@ -867,6 +872,8 @@ extension AVFormat: CustomStringConvertible {
 			return "H264"
 		case .av1:
 			return "AV1"
+		case .vp9:
+			return "VP9"
 		case .appleProResRAWHQ:
 			return "Apple ProRes RAW HQ"
 		case .appleProResRAW:
@@ -3518,7 +3525,7 @@ extension NSFont {
 		Self(descriptor: descriptor, size: 0) ?? self
 	}
 
-	// TODO: When Xcode 12.2 is out, use `[NSFont fontWithSize:]` when available.
+	// TODO: Remove this when targeting macOS 10.15 as it's then built-in.
 	/// Returns a font with the size replaced.
 	/// UIKit polyfill.
 	func withSize(_ size: CGFloat) -> NSFont {