Improvements to FloatingTweakWindow

 - hide the "floating button" if none of the tweaks in a TweakGroup are supported by the floating UI
 - made a picture-in-picture icon for the "floating button", and a matching "heavy-stroke x" for dismissing the floating tweak UI

SwiftTweaks/FloatingTweakGroupViewController.swift

@@ -27,6 +27,15 @@ internal final class FloatingTweakGroupViewController: UIViewController {
 		}
 	}
 
+	static func editingSupported(forTweak tweak: AnyTweak) -> Bool {
+		switch tweak.tweakViewDataType {
+		case .boolean, .integer, .cgFloat, .double:
+			return true
+		case .uiColor, .stringList, .string:
+			return false
+		}
+	}
+
 	private let presenter: FloatingTweaksWindowPresenter
 	fileprivate let tweakStore: TweakStore
 	private let fullFrame: CGRect
@@ -294,15 +303,8 @@ extension FloatingTweakGroupViewController: UIGestureRecognizerDelegate {
 extension FloatingTweakGroupViewController: UITableViewDelegate {
 	@objc func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
 		guard let tweak = tweakAtIndexPath(indexPath) else { return }
-		let tweakEditingAllowed: Bool
-		switch tweak.tweakViewDataType {
-		case .boolean, .integer, .cgFloat, .double:
-			tweakEditingAllowed = false
-		case .uiColor, .stringList, .string:
-			tweakEditingAllowed = false
-		}
 
-		if !tweakEditingAllowed {
+		if !FloatingTweakGroupViewController.editingSupported(forTweak: tweak) {
 			let alert = UIAlertController(title: "Can't edit this tweak here.", message: "You can edit it back in the main view, though!", preferredStyle: .alert)
 			alert.addAction(UIAlertAction(title: "Dismiss", style: .default, handler: nil))
 			present(alert, animated: true, completion: nil)

SwiftTweaks/Media.xcassets/floating-plus-button.imageset/Contents.json

@@ -2,17 +2,17 @@
   "images" : [
     {
       "idiom" : "universal",
-      "filename" : "FloatingPlusButton.png",
+      "filename" : "floating-plus-button.png",
       "scale" : "1x"
     },
     {
       "idiom" : "universal",
-      "filename" : "FloatingPlusButton@2x.png",
+      "filename" : "floating-plus-button@2x.png",
       "scale" : "2x"
     },
     {
       "idiom" : "universal",
-      "filename" : "FloatingPlusButton@3x.png",
+      "filename" : "floating-plus-button@3x.png",
       "scale" : "3x"
     }
   ],

SwiftTweaks/TweakCollectionViewController.swift

@@ -233,6 +233,11 @@ fileprivate final class TweakGroupSectionHeader: UITableViewHeaderFooterView {
 	var tweakGroup: TweakGroup? {
 		didSet {
 			titleLabel.text = tweakGroup?.title
+			guard let tweakGroup = tweakGroup else { return }
+			let shouldShowFloatingButton = tweakGroup.sortedTweaks.reduce(false) { (accum, tweak) -> Bool in
+				return accum || FloatingTweakGroupViewController.editingSupported(forTweak: tweak)
+			}
+			self.floatingButton.isHidden = !shouldShowFloatingButton
 		}
 	}