exposed scrollpos for content area

src/renderer/main/vueapp.js

@@ -151,6 +151,7 @@ const app = new Vue({
         tmpVar: [],
         notification: false,
         chrome: {
+            contentScrollPosY: 0,
             appliedTheme: {
                 location: "",
                 info: {}
@@ -876,6 +877,9 @@ const app = new Vue({
                 this.checkForThemeUpdates()
             }
         },
+        setContentScrollPos(scroll) {
+            this.chrome.contentScrollPosY = scroll.target.scrollTop
+        },
         async checkForThemeUpdates() {
             let self = this
             const themes = ipcRenderer.sendSync("get-themes")