vim-patch:8.1.1549: quickfix test fails

Problem:    Quickfix test fails.
Solution:   Negate result of bt_quickfix().
61eeeea8e6

Patch v8.1.1547 introduces the bug that is fixed by this patch.

N/A patches for version.c:

vim-patch:8.1.1590: popup window test fails

Problem:    Popup window test fails.
Solution:   Add "scrollbar" to expected result.
6c6a603cd2

vim-patch:8.1.1881: popup window test fails in some configurations

Problem:    Popup window test fails in some configurations.
Solution:   Check that screendumps can be made.
f4665e78f2

vim-patch:8.1.2079: popup window test fails without +terminal

Problem:    Popup window test fails without +terminal.
Solution:   Check for the +terminal feature.
d2c1fb476d

vim-patch:8.1.2322: quickfix test fails in very big terminal

Problem:    Quickfix test fails in very big terminal.
Solution:   Adjust the expected result for the width. (Masato Nishihata,
            closes vim/vim#5244)
ffc4fb8fee

Patch v8.1.2339 reverts the change but patch v8.1.2340 restores it.
Port of patch v8.1.2340 was merged and includes changes from patches
v8.1.2320, v8.1.2322, v8.1.2339.

vim-patch:8.2.2255: Tcl test fails

Problem:    Tcl test fails.
Solution:   Change option handling.
1779ff4842

src/nvim/quickfix.c

@@ -3622,7 +3622,7 @@ static int qf_open_new_cwindow(qf_info_T *qi, int height)
   // Set the options for the quickfix buffer/window (if not already done)
   // Do this even if the quickfix buffer was already present, as an autocmd
   // might have previously deleted (:bdelete) the quickfix buffer.
-  if (curbuf->b_p_bt[0] != 'q') {
+  if (!bt_quickfix(curbuf)) {
     qf_set_cwindow_options();
   }