Use .element.accent instead of elementGreen colour asset. (#79)

Remove local copy of Element Green

ElementX/Sources/Screens/RoomScreen/View/MessageComposer.swift

@@ -21,6 +21,10 @@ struct MessageComposer: View {
                 action()
             } label: {
                 Image(uiImage: Asset.Images.timelineComposerSendMessage.image)
+                    .background(Circle()
+                        .foregroundColor(.element.globalWhite)
+                        .padding(2)
+                    )
             }
             .padding(.bottom, 6.0)
             .disabled(disabled)

ElementX/Sources/Screens/RoomScreen/View/MessageComposerTextField.swift

@@ -32,7 +32,7 @@ struct MessageComposerTextField: View {
     }
     
     private var borderColor: Color {
-        Color(uiColor: Asset.Colors.elementGreen.color)
+        .element.accent
     }
     
     private var borderWidth: CGFloat {

ElementX/Sources/Screens/RoomScreen/View/Timeline/EventBasedTimelineView.swift

@@ -31,7 +31,7 @@ struct EventBasedTimelineView: View {
                 Image(uiImage: avatar)
                     .resizable()
                     .scaledToFill()
-                    .overlay(Circle().stroke(Color(uiColor: Asset.Colors.elementGreen.color)))
+                    .overlay(Circle().stroke(Color.element.accent))
             } else {
                 PlaceholderAvatarImage(firstCharacter: String(firstLetter))
             }

ElementX/Sources/Screens/RoomScreen/View/Timeline/FormattedBodyText.swift

@@ -29,7 +29,7 @@ struct FormattedBodyText: View {
                 }
             }
         }
-        .tint(Color(uiColor: Asset.Colors.elementGreen.color))
+        .tint(.element.accent)
     }
 }
 

ElementX/Sources/Screens/RoomScreen/View/Timeline/PlaceholderAvatarImage.swift

@@ -22,7 +22,7 @@ struct PlaceholderAvatarImage: View {
     
     var body: some View {
         ZStack {
-            Color(.sRGB, red: 0.05, green: 0.74, blue: 0.55, opacity: 1.0)
+            Color.element.accent
             Text(firstCharacter)
                 .padding(4)
                 .foregroundColor(.white)