Bugfix Issue #551 — DataTablesLengthMenu Include-Param Typo (PHP8 Warnings)

Problem

Three Smarty templates passed DataTablesLengthMenu (lowercase l) as an include parameter to DataTables.inc.tpl, which reads $DataTablesLengthMenu (uppercase L). Smarty variable names are case-sensitive, so the variable was undefined/null on every render, causing PHP 8.1+ E_WARNING:

• Undefined array key "DataTablesLengthMenu"
• Attempt to read property "value" on null

Root Cause

Copy-paste typo — lengthMenu vs LengthMenu. The same bug was already fixed in tcAssign2Tplan.tpl by issue #541, but not propagated to the three remaining files.

Fix

One-character capitalization (l → L) in each file:

File	Line
gui/templates/dashio/plan/buildView.tpl	43
gui/templates/dashio/testcases/containerMoveTC.tpl	28
gui/templates/dashio/cfields/cfieldsTprojectAssign.tpl	26

Verification

• Compiled templates now pass DataTablesLengthMenu (uppercase L) — confirmed via grep of gui/templates_c/.
• DataTable renders with correct lengthMenu dropdown (20, 40, 60, All).
• Event Viewer: zero new E_WARNING entries.
• Console: zero JavaScript errors.

Affected Pages

• Build Management (buildView.php)
• Move/Copy Test Cases dialog (containerMoveTC.tpl)
• Assign Custom Fields to Test Project (cfieldsTprojectAssign.tpl)