fix(web): raise display Rows field max from 64 to 128

Cols already allowed up to 128; Rows was capped at 64, which rejects
valid larger panel configurations (e.g. 128-row tile chains). No
server-side schema enforces a rows max, so this was purely an
overly-strict HTML input attribute.

web_interface/templates/v3/partials/display.html

@@ -47,7 +47,7 @@
                            name="rows"
                            value="{{ main_config.display.hardware.rows or 32 }}"
                            min="1"
-                           max="64"
+                           max="128"
                            class="form-control">
                 </div>