Refine polls UI in the timeline (#1474)

* Add summary view in PollRoomTimelineView

* Add selectedPollOption action

* Handle undisclosed polls

* Add more logics in PollRoomTimelineView

* Refine ended poll UI

* Refine poll layout

* More UI refinements

* Fix layout issue

* Refine progress bar

* Add poll mocks and UI tests

* Cleanup

ElementX/Sources/Services/Timeline/TimelineItems/Items/Other/PollRoomTimelineItem.swift

@@ -29,7 +29,7 @@ struct PollRoomTimelineItem: Equatable, EventBasedTimelineItemProtocol {
 
 struct Poll: Equatable {
     let question: String
-    let pollKind: Kind
+    let kind: Kind
     let maxSelections: Int
     let options: [Option]
     let votes: [String: [String]]
@@ -46,5 +46,6 @@ struct Poll: Equatable {
         let votes: Int
         let allVotes: Int
         let isSelected: Bool
+        let isWinning: Bool
     }
 }