action: tab: Release mouse press in case of mouse release while not pressed

internal/action/bufpane.go

@@ -500,12 +500,17 @@ func (h *BufPane) HandleEvent(event tcell.Event) {
 			// Mouse event with no click - mouse was just released.
 			// If there were multiple mouse buttons pressed, we don't know which one
 			// was actually released, so we assume they all were released.
+			pressed := len(h.mousePressed) > 0
 			for me := range h.mousePressed {
 				delete(h.mousePressed, me)
 
 				me.state = MouseRelease
 				h.DoMouseEvent(me, e)
 			}
+			if !pressed {
+				// Propagate the mouse release in case the press wasn't for this BufPane
+				Tabs.ResetMouse()
+			}
 		}
 	}
 	h.Buf.MergeCursors()