Revert "gui: add platform-specific spacer above wxNotebook"

This reverts commit fcaa51f.

Author: bk138

src/gui/multivnc.wxg

@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<!-- generated by wxGlade 1:1.1.1+repack on Tue Feb 24 16:41:34 2026 -->
+<!-- generated by wxGlade 1:1.1.1+repack on Tue Feb 24 07:58:57 2026 -->
 
 <application encoding="UTF-8" for_version="3.0" header_extension=".h" indent_amount="4" indent_symbol="space" is_template="0" language="C++" mark_blocks="1" option="1" overwrite="1" path="." source_extension=".cpp" top_window="frame_main" use_gettext="1" use_new_namespace="1">
     <object class="FrameMain" name="frame_main" base="EditFrame">
@@ -410,13 +410,12 @@
                                 <object class="wxPanel" name="splitwin_main_pane_2" base="EditPanel">
                                     <style>wxTAB_TRAVERSAL</style>
                                     <object class="wxBoxSizer" name="sizer_notebook" base="EditBoxSizer">
-                                        <orient>wxVERTICAL</orient>
+                                        <orient>wxHORIZONTAL</orient>
                                         <object class="sizeritem">
                                             <option>1</option>
                                             <border>3</border>
                                             <flag>wxALL|wxEXPAND</flag>
                                             <object class="wxNotebook" name="notebook_connections" base="EditNotebook">
-                                                <extracode_pre>#ifdef __WXMAC__\n sizer_notebook-&gt;Add(0, 4, 0, 0, 0);\n#else\n sizer_notebook-&gt;Add(0, 10, 0, 0, 0);\n#endif\n</extracode_pre>
                                                 <events>
                                                     <handler event="EVT_NOTEBOOK_PAGE_CHANGED">notebook_connections_pagechanged</handler>
                                                 </events>