Connect to several servers, one coloured window each

mac/Sources/Byre/Store.swift

@@ -50,6 +50,7 @@ final class Store {
     var pickedMembers: [String: String] = [:]
     private(set) var drafts: Drafts?
     let images = ImageDrafts()
+    let imageCache = ImageCache()
     let events = Listeners<ByreEvent>()
     let paneFocus: PaneFocus
     let remote: Remote
@@ -60,6 +61,7 @@ final class Store {
     @ObservationIgnored private var globalStream: EventStream?
     @ObservationIgnored private var leadStream: EventStream?
     @ObservationIgnored private var stopped = false
+    @ObservationIgnored var changesMemory = ChangesMemory()
 
     init(api: API) {
         self.api = api