patch 8.2.1737: cursor line highlight in popup window is not always updated

Problem:    Cursor line highlight in popup window is not always updated.
Solution:   Check if the cursor has moved. (closes #7010)

src/popupwin.c

@@ -3711,6 +3711,11 @@ update_popups(void (*win_update)(win_T *wp))
 	// Draw the popup text, unless it's off screen.
 	if (wp->w_winrow < screen_Rows && wp->w_wincol < screen_Columns)
 	{
+	    // May need to update the "cursorline" highlighting, which may also
+	    // change "topline"
+	    if (wp->w_popup_last_curline != wp->w_cursor.lnum)
+		popup_highlight_curline(wp);
+
 	    win_update(wp);
 
 	    // move the cursor into the visible lines, otherwise executing

src/testdir/dumps/Test_popupwin_win_execute_cursorline.dump

@@ -0,0 +1,14 @@
+> +0&#ffffff0@74
+|~+0#4040ff13&| @73
+|~| @34|1+0#0000001#ffd7ff255|4| +0#0000000#a8a8a8255| +0#4040ff13#ffffff0@35
+|~| @34|1+0#0000001#ffd7ff255|5| +0#0000000#a8a8a8255| +0#4040ff13#ffffff0@35
+|~| @34|1+0#0000001#ffd7ff255|6| +0#0000000#a8a8a8255| +0#4040ff13#ffffff0@35
+|~| @34|1+0#0000001#e0e0e08|7| +0#0000000#a8a8a8255| +0#4040ff13#ffffff0@35
+|~| @34|1+0#0000001#ffd7ff255|8| +0#0000000#0000001| +0#4040ff13#ffffff0@35
+|~| @34|1+0#0000001#ffd7ff255|9| +0#0000000#0000001| +0#4040ff13#ffffff0@35
+|~| @34|2+0#0000001#ffd7ff255|0| +0#0000000#0000001| +0#4040ff13#ffffff0@35
+|~| @34|2+0#0000001#ffd7ff255|1| +0#0000000#a8a8a8255| +0#4040ff13#ffffff0@35
+|~| @34|2+0#0000001#ffd7ff255@1| +0#0000000#a8a8a8255| +0#4040ff13#ffffff0@35
+|~| @73
+|~| @73
+|:+0#0000000&| @55|0|,|0|-|1| @8|A|l@1| 

src/testdir/test_popupwin.vim

@@ -1556,16 +1556,41 @@ func Test_popup_filter_normal_cmd()
   call delete('XtestPopupNormal')
 endfunc
 
-" this tests that we don't get stuck with an error in "win_execute()"
+" test that cursor line highlight is updated after using win_execute()
 func Test_popup_filter_win_execute()
   CheckScreendump
 
+  let lines =<< trim END
+      let lines = range(1, &lines * 2)->map({_, v -> string(v)})
+      let g:id = popup_create(lines, #{
+	  \ minheight: &lines - 5,
+	  \ maxheight: &lines - 5,
+	  \ cursorline: 1,
+	  \ })
+      redraw
+  END
+  call writefile(lines, 'XtestPopupWinExecute')
+  let buf = RunVimInTerminal('-S XtestPopupWinExecute', #{rows: 14})
+
+  call term_sendkeys(buf, ":call win_execute(g:id, ['normal 17Gzz'])\<CR>")
+  call term_sendkeys(buf, ":\<CR>")
+
+  call VerifyScreenDump(buf, 'Test_popupwin_win_execute_cursorline', {})
+
+  call StopVimInTerminal(buf)
+  call delete('XtestPopupWinExecute')
+endfunc
+
+" this tests that we don't get stuck with an error in "win_execute()"
+func Test_popup_filter_win_execute_error()
+  CheckScreendump
+
   let lines =<< trim END
       let g:winid = popup_create('some text', {'filter': 'invalidfilter'})
       call timer_start(0, {-> win_execute(g:winid, 'invalidCommand')})
   END
-  call writefile(lines, 'XtestPopupWinExecute')
+  call writefile(lines, 'XtestPopupWinExecuteError')
-  let buf = RunVimInTerminal('-S XtestPopupWinExecute', #{rows: 10, wait_for_ruler: 0})
+  let buf = RunVimInTerminal('-S XtestPopupWinExecuteError', #{rows: 10, wait_for_ruler: 0})
 
   call WaitFor({-> term_getline(buf, 9) =~ 'Not an editor command: invalidCommand'})
   call term_sendkeys(buf, "\<CR>")
@@ -1577,7 +1602,7 @@ func Test_popup_filter_win_execute()
   call VerifyScreenDump(buf, 'Test_popupwin_win_execute', {})
 
   call StopVimInTerminal(buf)
-  call delete('XtestPopupWinExecute')
+  call delete('XtestPopupWinExecuteError')
 endfunc
 
 func ShowDialog(key, result)

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1737,
 /**/
     1736,
 /**/