Measure the editor chrome instead of assuming 38px, so the last lines are reachable

Plugin/unraid/pages/scheduler.php

@@ -1171,7 +1171,17 @@ function vvFitRight() {
   }
   const ed = document.getElementById('vv-editor');
   if (ed.style.display !== 'none') {
-    const _edH = Math.max(60, contentH - 38) + 'px';
+    // Everything inside the editor pane that is not the text box: the status bar below it, and
+    // the shortcut help above when open. Measured, not assumed — this subtracted a hardcoded
+    // 38px, which under-counted the real chrome by ~100px. The textarea was therefore sized
+    // taller than #vv-editor-wrap, which is overflow:hidden, so its last ~6 lines rendered
+    // below the clip with the textarea's own scroll already at its end: nothing to scroll, and
+    // content you can see is missing. Reported against master.conf as stopping mid-line 1684
+    // of 1689, unchanged by expanding or collapsing the job tree — a fixed offset, which is
+    // what a constant this wrong looks like.
+    const _wrap  = document.getElementById('vv-editor-wrap');
+    const _chrome = Math.max(0, ed.scrollHeight - _wrap.offsetHeight);
+    const _edH = Math.max(60, contentH - _chrome) + 'px';
     const _ta  = document.getElementById('vv-editor-body');
     _ta.style.height = _edH;
     document.getElementById('vv-ln-gutter').style.height   = _edH;