Widget Frame: Master Frame
+--------------------------+---------------------------+
| Widget Frame: Left frame | Widget Frame: Right Frame |
+--------------------------+---------------------------+

Widget Frame: Left frame
+-----------------------+--------------------------------------+-----------------------------------------+-------------------------------+-----------------------------------+
|  Button("TL Corner")  |      Button("Very wide button")
+-----------------------+--------------------------------------+-----------------------------------------+-------------------------------+-----------------------------------+
| Button("Tall Button") | Button("Another placeholder button") |         Button("Col 2 button")          |    Button("Col 3 button")     |                                   |
+                       +--------------------------------------+-----------------------------------------+-------------------------------+-----------------------------------+
|                       | Button("Another placeholder button") | Button("Because this button overlaps!") | Button("Half hidden button.")                                     |
+-----------------------+--------------------------------------+-----------------------------------------+                               +                                   +
| Button("Wide Button")                                        |       Button("Very tall button")        |                                                                   |
+-----------------------+--------------------------------------+                                         +-------------------------------+-----------------------------------+
|                       | Button("Another placeholder button") |                                         |                               |                                   |
+-----------------------+--------------------------------------+                                         +-------------------------------+-----------------------------------+

Widget Frame: Right Frame
+-------------+-------------+
|             | Button("A") |
+-------------+-------------+
| Button("B")               |
+-------------+-------------+
| Button("C") | Button("D") |
+-------------+-------------+

