Fix mouse=a in tests

vim-9.1-copy-paste.patch

@@ -413,3 +413,31 @@ index 3a3e989..e3f1648 100644
      call setline(1, ['one', 'two', 'three'])
      hi BorderColor ctermbg=lightcyan guibg=lightcyan
    END
+diff --git a/src/testdir/test_cmdline.vim b/src/testdir/test_cmdline.vim
+index c286fc4..b370c30 100644
+--- a/src/testdir/test_cmdline.vim
++++ b/src/testdir/test_cmdline.vim
+@@ -3200,6 +3200,7 @@ func Test_wildmenu_pum_info_async_update()
+   let lines =<< trim END
+       vim9script
+       set completeopt=menuone,popup
++      set mouse=a
+       set wildmenu wildoptions=pum wildcharm=<Tab>
+       augroup Test
+           au!
+@@ -4696,6 +4697,7 @@ func Test_customlist_dict_completion_info_popup()
+             \ 'plain',
+             \ ]
+     endfunc
++    set mouse=a
+     command -nargs=1 -complete=customlist,DictComp DictCmd echo <q-args>
+     set wildmenu wildoptions=pum completeopt=menu,popup
+   END
+@@ -4752,6 +4754,7 @@ func Test_cmdline_complete_findfunc_dict()
+   CheckScreendump
+ 
+   let lines =<< trim END
++    set mouse=a
+     set wildmenu wildoptions=pum completeopt=menu,popup
+     func FindComplete(cmdarg, cmdcomplete)
+       return [