move cursor to last character of selection

Writes an array of 4 values. On little-endian machines (e.g. x86_64), the order is reversed, so `x[0]` corresponds to `vector.s[3]`. */

utf8_to_ucs4_string - convert UTF-8 string to UCS string * * Return UCS count. Now returns int so can return -1. */

We intentionally avoid using ImVec2 and its math operators here to reduce cost to a minimum for debug/non-inlined builds.

x0/y0/x1/y1 are offset from the character upper-left layout position, in pixels. Therefore x0/y0 are often fairly close to zero. Not to be mistaken wi

Layer is locked for the root window, however child windows may use a different viewport (e.g. extruding menu)