add an option to InputRoll for "Selection when paging", as a bit of a hack to revert Tastudio back to its old PgUp/Dn behavior, while still keeping the current behavior for other input roll usages (as it makes more sense for traditional listview behavior). Fixes #2074

src/BizHawk.Client.EmuHawk/CustomControls/InputRoll/InputRoll.cs

@@ -376,6 +376,14 @@ namespace BizHawk.Client.EmuHawk
 		[Category("Behavior")]
 		public int SeekingCutoffInterval { get; set; }
 
+		/// <summary>
+		/// Gets or sets a value indicating whether pressing page up/down will cause
+		/// the current selection to change
+		/// </summary>
+		[DefaultValue(false)]
+		[Category("Behavior")]
+		public bool ChangeSelectionWhenPaging { get; set; } = true;
+
 		/// <summary>
 		/// Returns all columns including those that are not visible
 		/// </summary>
@@ -1351,6 +1359,8 @@ namespace BizHawk.Client.EmuHawk
 				}
 				// Scroll
 				else if (!e.Control && !e.Alt && !e.Shift && e.KeyCode == Keys.PageUp) // Page Up
+				{
+					if (ChangeSelectionWhenPaging)
 					{
 						var selectedRow = SelectedRows.Any() ? SelectedRows.First() : FirstVisibleRow;
 						var increment = LastVisibleRow - FirstVisibleRow;
@@ -1365,7 +1375,14 @@ namespace BizHawk.Client.EmuHawk
 						SelectRow(newSelectedRow, true);
 						Refresh();
 					}
+					else if (FirstVisibleRow > 0)
+					{
+						LastVisibleRow = FirstVisibleRow;
+					}
+				}
 				else if (!e.Control && !e.Alt && !e.Shift && e.KeyCode == Keys.PageDown) // Page Down
+				{
+					if (ChangeSelectionWhenPaging)
 					{
 						var selectedRow = SelectedRows.Any() ? SelectedRows.First() : FirstVisibleRow;
 						var increment = LastVisibleRow - FirstVisibleRow;
@@ -1380,6 +1397,11 @@ namespace BizHawk.Client.EmuHawk
 						SelectRow(newSelectedRow, true);
 						Refresh();
 					}
+					else if (LastVisibleRow < RowCount)
+					{
+						FirstVisibleRow = LastVisibleRow;
+					}
+				}
 				else if (AllowMassNavigationShortcuts && !e.Control && !e.Alt && !e.Shift && e.KeyCode == Keys.Home) // Home
 				{
 					DeselectAll();

src/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.Designer.cs

@@ -880,6 +880,7 @@ namespace BizHawk.Client.EmuHawk
 			// 
 			// TasView
 			//
+			this.TasView.ChangeSelectionWhenPaging = false;
 			this.TasView.InputPaintingMode = true;
 			this.TasView.CellWidthPadding = 3;
 			this.TasView.GridLines = true;