Add component size display, misc. code improvements

Author: WumboSpasm

src/Common.cs

@@ -201,7 +201,7 @@ public static long ToDownload
                     set
                     {
                         toDownload = value;
-                        Main.DownloadSizeDisplay.Text = GetFormattedBytes(toDownload);
+                        Main.TotalSizeDisplay.Text = GetFormattedBytes(toDownload);
                     }
                 }
                 // Tracks size difference from checking/unchecking components in the manager tab
@@ -210,7 +210,7 @@ public static long Modified
                     get => modified;
                     set {
                         modified = value;
-                        Main.ManagerSizeDisplay.Text = GetFormattedBytes(modified - Downloaded);
+                        Main.TotalSizeDisplay2.Text = GetFormattedBytes(modified - Downloaded);
                     }
                 }
             }

src/Forms/MainDownload.Designer.cs

@@ -76,9 +76,22 @@ private void ComponentList_AfterCheck(object sender, TreeViewEventArgs e)
 
         private void ComponentList_BeforeSelect(object _, TreeViewCancelEventArgs e)
         {
-            Description.Text = e.Node.Tag.GetType().ToString().EndsWith("Component")
-                ? (e.Node.Tag as Component).Description
-                : (e.Node.Tag as Category).Description;
+            bool isComponent = e.Node.Tag.GetType().ToString().EndsWith("Component");
+
+            if (isComponent)
+            {
+                var component = e.Node.Tag as Component;
+
+                Description.Text = component.Description;
+                SizeDisplay.Text = FPM.GetFormattedBytes(component.Size);
+            }
+            else
+            {
+                Description.Text = (e.Node.Tag as Category).Description;
+            }
+
+            SizeLabel.Visible = isComponent;
+            SizeDisplay.Visible = isComponent;
         }
 
         private void DestinationPathBrowse_Click(object _, EventArgs e)