rem: Scroll from Propierties of Container

Updated the corresponding documentation and ideas for how to realize
scrollable contents.

src/container.zig

@@ -185,17 +185,6 @@ pub const Rectangle = packed struct {
     }
 };
 
-/// Scroll configuration struct
-pub const Scroll = packed struct {
-    /// Enable horizontal scrolling for this element
-    horizontal: bool = false,
-    /// Enable vertical scrolling for this element
-    vertical: bool = false,
-
-    // TODO: rendering enhancements:
-    // - render corresponding scroll-bars?
-};
-
 /// Layout configuration struct
 pub const Layout = packed struct {
     /// control the direction in which child elements are laid out
@@ -244,7 +233,6 @@ pub fn Container(comptime Event: type) type {
         pub const Properties = packed struct {
             border: Border = .{},
             rectangle: Rectangle = .{},
-            scroll: Scroll = .{},
             layout: Layout = .{},
         };
 
@@ -328,9 +316,7 @@ pub fn Container(comptime Event: type) type {
                             break :blk rows - element_rows * len;
                         },
                     };
-                    // TODO: make sure that items cannot underflow in size!
-                    // - make their size and position still according (even if outside of the visible space!)
-                    // - don't render them then accordingly -> avoid index out of bounce accesses!
+
                     for (this.elements.items) |*element| {
                         var element_size: Size = undefined;
                         switch (layout.direction) {