fix(gifs): fix call to setGifUnfurlingEnabled using a bad store (#16622)

Fixes #16598

The gif popup was using the global RootStore, but it didn't work and it's also not a good practice.

I moved the function to enable to the GifStore which is accessible as a reference instead.

ui/imports/shared/status/StatusGifPopup.qml

@@ -206,7 +206,7 @@ Popup {
             visible: true
 
             onEnableGifsRequested: {
-                RootStore.setGifUnfurlingEnabled(true)
+                root.gifStore.setGifUnfurlingEnabled(true)
                 root.gifStore.getTrendingsGifs()
             }
         }

ui/imports/shared/stores/GifStore.qml

@@ -13,6 +13,10 @@ QtObject {
     property var gifColumnC: d.gifsModuleInst ? d.gifsModuleInst.gifColumnC : null
     property bool gifLoading: d.gifsModuleInst ? d.gifsModuleInst.gifLoading : false
 
+    function setGifUnfurlingEnabled(value) {
+        localAccountSensitiveSettings.gifUnfurlingEnabled = value
+    }
+
     function searchGifs(query) {
         if (d.gifsModuleInst)
             d.gifsModuleInst.searchGifs(query)

ui/imports/shared/stores/RootStore.qml

@@ -22,10 +22,6 @@ QtObject {
         localAccountSensitiveSettings.neverAskAboutUnfurlingAgain = value;
     }
 
-    function setGifUnfurlingEnabled(value) {
-        localAccountSensitiveSettings.gifUnfurlingEnabled = value
-    }
-
     function getPasswordStrengthScore(password) {
         return root.privacyModule.getPasswordStrengthScore(password);
     }