Bugfix: TextBuffer Line Wrapping from VTRenderer (#2797)

* Bugfix: line selection copy

* Revert clipboard change
Change VT renderer to do erase line instead of a ton of erase chars

* revert TerminalApi change

(cherry picked from commit 8afc5b2)

src/renderer/vt/paint.cpp

@@ -475,14 +475,22 @@ using namespace Microsoft::Console::Types;
 
     if (useEraseChar)
     {
-        RETURN_IF_FAILED(_EraseCharacter(sNumSpaces));
         // ECH doesn't actually move the cursor itself. However, we think that
         //   the cursor *should* be at the end of the area we just erased. Stash
         //   that position as our new deferred position. If we don't move the
         //   cursor somewhere else before the end of the frame, we'll move the
         //   cursor to the deferred position at the end of the frame, or right
         //   before we need to print new text.
         _deferredCursorPos = { _lastText.X + sNumSpaces, _lastText.Y };
+
+        if (_deferredCursorPos.X < _lastViewport.RightInclusive())
+        {
+            RETURN_IF_FAILED(_EraseCharacter(sNumSpaces));
+        }
+        else
+        {
+            RETURN_IF_FAILED(_EraseLine());
+        }
     }
     else if (_newBottomLine)
     {