[mutter] display: Reset all grab properties after a grab op

[Marge Bot <marge-bot src gnome org>]

commit 91d03f1c96f6dae9c13c8fbb00cf1763bac30886
Author: Jonas Dreßler <verdre v0yd nl>
Date:   Fri Feb 19 12:26:12 2021 +0100

    display: Reset all grab properties after a grab op
    
    Make sure to reset all the state that was set for an interactive grab op
    back to the defaults after a grab op has ended.
    
    Especially important here is setting grab_frame_action back to FALSE,
    since this will constrain window-titlebars to the panel. We set this to
    TRUE on some grabs, for example when resizing, but not when moving
    windows. Since this remained being set to TRUE, it would also constrain
    non-grab window movements, like calling MetaWindow.move_frame(), which
    is used by gnome-shells OSK. By resetting it back to FALSE after a grab,
    the OSK can now always move non-maximized windows to the position it
    wants.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1736>

 src/core/display.c | 8 ++++++++
 1 file changed, 8 insertions(+)
---
diff --git a/src/core/display.c b/src/core/display.c
index 8261d42556..f23618e560 100644
--- a/src/core/display.c
+++ b/src/core/display.c
@@ -1966,8 +1966,16 @@ meta_display_end_grab_op (MetaDisplay *display,
 
   display->event_route = META_EVENT_ROUTE_NORMAL;
   display->grab_window = NULL;
+  display->grab_button = 0;
   display->grab_tile_mode = META_TILE_NONE;
   display->grab_tile_monitor_number = -1;
+  display->grab_anchor_root_x = 0;
+  display->grab_anchor_root_y = 0;
+  display->grab_latest_motion_x = 0;
+  display->grab_latest_motion_y = 0;
+  display->grab_last_moveresize_time = 0;
+  display->grab_last_edge_resistance_flags = META_EDGE_RESISTANCE_DEFAULT;
+  display->grab_frame_action = FALSE;
 
   meta_display_update_cursor (display);