#11799 Add support for user defined 3D View

From the View menu, add Store and Apply User Defined View
Show Apply User Defined View in the View toolbar

Rename Look Down -> Top View and Look Up -> Bottom View
Update keyboard shortcuts to new naming

ApplicationExeCode/Resources/user-defined-view.svg

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg" xmlns:bx="https://boxy-svg.com">
+  <path d="M 13.744 12.017 C 16.574 7.997 14.479 2.561 10.026 1.246 L 10.026 2.586 C 11.421 3.11 12.581 4.165 13.224 5.554 C 15.09 9.576 11.901 14.109 7.486 13.712 C 5.436 13.529 3.64 12.265 2.775 10.399 C 1.295 7.206 2.999 3.692 5.973 2.576 L 5.973 1.252 C 4.492 1.698 3.174 2.629 2.255 3.935 C -0.856 8.357 1.988 14.488 7.373 14.972 C 9.872 15.196 12.3 14.07 13.744 12.017 Z" style="fill: rgb(128, 128, 128);"/>
+  <path fill-rule="evenodd" clip-rule="evenodd" d="M 8.928 4.353 C 8.683 4.576 8.352 4.702 8.006 4.705 L 7.994 4.705 C 7.648 4.702 7.318 4.576 7.073 4.353 C 6.828 4.132 6.689 3.833 6.685 3.519 C 6.68 3.298 6.748 3.078 6.883 2.892 L 7.913 1 L 8.088 1 L 9.118 2.892 C 9.251 3.078 9.32 3.298 9.316 3.519 C 9.311 3.833 9.172 4.132 8.928 4.353 Z" style="fill: rgb(117, 190, 255);"/>
+  <text transform="matrix(0.997982, 0, 0, 1.028913, 4.966925, 0.845102)" style="fill: rgb(251, 176, 0); font-family: Arial; font-size: 7.22325px; font-weight: 900; stroke-width: 0.34715px; white-space: pre;" x="0.306" y="9.548">U</text>
+</svg>