installer: add editor.rogue configuration if EDITOR=vim selected

Proactively activate the rogue.editor configuration option if the
user persists on using VIM even after being warned against it, to
avoid the possibility of terminal output corruption like the one
described in microsoft/terminal#9359.

Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>

installer/install.iss

@@ -1866,7 +1866,7 @@ begin
     // 2nd choice
     Top:=TopOfLabels;
     CbbEditor.Items.Add('Use Vim (the ubiquitous text editor) as Git'+#39+'s default editor');
-    CreateItemDescription(EditorPage,'The <A HREF=http://www.vim.org/>Vim editor</A>, while powerful, <A HREF=https://stackoverflow.blog/2017/05/23/stack-overflow-helping-one-million-developers-exit-vim/>can be hard to use</A>. Its user interface is'+#13+'unintuitive and its key bindings are awkward.'+#13+#13+'<RED>Note:</RED> Vim is the default editor of Git for Windows only for historical reasons, and'+#13+'it is highly recommended to switch to a modern GUI editor instead.'+#13+#13+'<RED>Note:</RED> This will leave the '+#39+'core.editor'+#39+' option unset, which will make Git fall back'+#13+'to the '+#39+'EDITOR'+#39+' environment variable. The default editor is Vim - but you'+#13+'may set it to some other editor of your choice.',Top,Left,LblEditor[GE_VIM],False);
+    CreateItemDescription(EditorPage,'The <A HREF=http://www.vim.org/>Vim editor</A>, while powerful, <A HREF=https://stackoverflow.blog/2017/05/23/stack-overflow-helping-one-million-developers-exit-vim/>can be hard to use</A>. Its user interface is'+#13+'unintuitive and its key bindings are awkward.'+#13+#13+'<RED>Note:</RED> Vim is the default editor of Git for Windows only for historical reasons, and'+#13+'it is highly recommended to switch to a modern GUI editor instead.'+#13+#13+'<RED>Note:</RED> This will leave the '+#39+'core.editor'+#39+' option unset and enable editor.rogue, which will make Git fall back'+#13+'to the '+#39+'EDITOR'+#39+' environment variable. The default editor is Vim - but you'+#13+'may set it to some other editor of your choice.',Top,Left,LblEditor[GE_VIM],False);
     EditorAvailable[GE_VIM]:=True;
 
     // 3rd choice
@@ -3365,6 +3365,8 @@ begin
     WizardForm.StatusLabel.Caption:='Configuring default editor';
     if (CbbEditor.ItemIndex=GE_Nano) then
         GitSystemConfigSet('core.editor','nano.exe')
+    else if (CbbEditor.ItemIndex=GE_VIM) then
+        GitSystemConfigSet('editor.rogue', 'true')
     else if ((CbbEditor.ItemIndex=GE_NotepadPlusPlus)) and (NotepadPlusPlusPath<>'') then
         GitSystemConfigSet('core.editor','"'+NotepadPlusPlusPath+'" -multiInst -notabbar -nosession -noPlugin')
     else if ((CbbEditor.ItemIndex=GE_VisualStudioCode)) and (VisualStudioCodePath<>'') then begin