Make sure all rows are refreshed on input

Fixes #3323

Author: Tyriar

src/browser/Viewport.ts

@@ -30,7 +30,6 @@ export class Viewport extends Disposable implements IViewport {
   private _wheelPartialScroll: number = 0;
 
   private _refreshAnimationFrame: number | null = null;
-  private _ignoreNextScrollEvent: boolean = false;
 
   constructor(
     private readonly _scrollLines: (amount: number) => void,
@@ -88,14 +87,12 @@ export class Viewport extends Disposable implements IViewport {
     // Sync scrollTop
     const scrollTop = this._bufferService.buffer.ydisp * this._currentRowHeight;
     if (this._viewportElement.scrollTop !== scrollTop) {
-      // Ignore the next scroll event which will be triggered by setting the scrollTop as we do not
-      // want this event to scroll the terminal
-      this._ignoreNextScrollEvent = true;
       this._viewportElement.scrollTop = scrollTop;
     }
 
     this._refreshAnimationFrame = null;
   }
+
   /**
    * Updates dimensions and synchronizes the scroll area if necessary.
    */
@@ -148,12 +145,6 @@ export class Viewport extends Disposable implements IViewport {
       return;
     }
 
-    // Ignore the event if it was flagged to ignore (when the source of the event is from Viewport)
-    if (this._ignoreNextScrollEvent) {
-      this._ignoreNextScrollEvent = false;
-      return;
-    }
-
     const newRow = Math.round(this._lastScrollTop / this._currentRowHeight);
     const diff = newRow - this._bufferService.buffer.ydisp;
     this._scrollLines(diff);