Make GIF search more responsive

Session/Media Viewing & Editing/GIFs/GifPickerLayout.swift

@@ -60,7 +60,7 @@ class GifPickerLayout: UICollectionViewLayout {
         // We  use 2 or 3 columns, depending on the device.
         // 2 columns will show fewer GIFs at a time,
         // but use less network & be a more responsive experience.
-        let columnCount = UInt(max(2, collectionView.width() / 130))
+        let columnCount = UInt(2)
 
         let totalViewWidth = UInt(collectionView.width())
         let hTotalWhitespace = (2 * hInset) + (hSpacing * (columnCount - 1))

Session/Media Viewing & Editing/GIFs/GiphyAPI.swift

@@ -285,13 +285,13 @@ extension GiphyError: LocalizedError {
     private let kGiphyBaseURL = "https://api.giphy.com/"
 
     private func giphyAPISessionManager() -> AFHTTPSessionManager? {
-        return ContentProxy.jsonSessionManager(baseUrl: kGiphyBaseURL)
+        return AFHTTPSessionManager(baseURL: URL(string: kGiphyBaseURL), sessionConfiguration: .ephemeral)
     }
 
     // MARK: Search
     // This is the Signal iOS API key.
     let kGiphyApiKey = "ZsUpUm2L6cVbvei347EQNp7HrROjbOdc"
-    let kGiphyPageSize = 100
+    let kGiphyPageSize = 20
     
     public func trending() -> Promise<[GiphyImageInfo]> {
         guard let sessionManager = giphyAPISessionManager() else {