Resolves tdf#146762 - Consistency for list indent and level shortcuts

Previously:
* Shift + Tab on the first item decreases the indention
* Tab on first item increases the indention

* Shift + Tab on any item but the first does nothing
* Tab on any item but the first demotes the list level

* Ctrl + Tab on any item including the first inserts a literal tab

New:
* Tab on any item demotes the list item (move right)
* Shift + Tab on any item demotes the list item (move left)

* Ctrl + Tab on any item indents the whole list
* Ctrl + Shift + Tab on any item outdents the whole list

Change-Id: If64a5103a271d30c10fc903a306c9271e61cae49
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/134856
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
diff --git a/sw/source/uibase/docvw/edtwin.cxx b/sw/source/uibase/docvw/edtwin.cxx
index 69dc6f7..1c29953 100644
--- a/sw/source/uibase/docvw/edtwin.cxx
+++ b/sw/source/uibase/docvw/edtwin.cxx
@@ -2051,20 +2051,13 @@ KEYINPUT_CHECKTABLE_INSDEL:
                             && rSh.IsSttOfPara()
                             && !rSh.HasReadonlySel() )
                    {
                        if ( !rSh.IsMultiSelection()
                             && rSh.IsFirstOfNumRuleAtCursorPos()
                             && numfunc::ChangeIndentOnTabAtFirstPosOfFirstListItem() )
                            eKeyState = SwKeyState::NumIndentInc;
                        if (numfunc::NumDownChangesIndent(rSh))
                        {
                            eKeyState = SwKeyState::NumDown;
                        }
                        else
                        {
                            if (numfunc::NumDownChangesIndent(rSh))
                            {
                                eKeyState = SwKeyState::NumDown;
                            }
                            else
                            {
                                eKeyState = SwKeyState::InsTab;
                            }
                            eKeyState = SwKeyState::InsTab;
                        }
                    }
                    else if (rSh.GetSelectionType() &
@@ -2116,12 +2109,7 @@ KEYINPUT_CHECKTABLE_INSDEL:
                             && rSh.IsSttOfPara()
                             && !rSh.HasReadonlySel() )
                    {
                        if ( !rSh.IsMultiSelection()
                             && rSh.IsFirstOfNumRuleAtCursorPos()
                             && numfunc::ChangeIndentOnTabAtFirstPosOfFirstListItem() )
                            eKeyState = SwKeyState::NumIndentDec;
                        else
                            eKeyState = SwKeyState::NumUp;
                        eKeyState = SwKeyState::NumUp;
                    }
                    else if (rSh.GetSelectionType() &
                             (SelectionType::Graphic |
@@ -2176,7 +2164,9 @@ KEYINPUT_CHECKTABLE_INSDEL:
                            eKeyState = SwKeyState::EnterDrawHandleMode;
                        else
                        {
                            eKeyState = SwKeyState::InsTab;
                            if ( !rSh.IsMultiSelection()
                                && numfunc::ChangeIndentOnTabAtFirstPosOfFirstListItem() )
                                eKeyState = SwKeyState::NumIndentInc;
                        }
                    }
                    break;
@@ -2197,6 +2187,12 @@ KEYINPUT_CHECKTABLE_INSDEL:
                        {
                            eKeyState = SwKeyState::EnterDrawHandleMode;
                        }
                        else
                        {
                            if ( !rSh.IsMultiSelection()
                                && numfunc::ChangeIndentOnTabAtFirstPosOfFirstListItem() )
                                eKeyState = SwKeyState::NumIndentDec;
                        }
                    }
                    break;
                    case KEY_F2 :