.f-no-select {
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
.m-tree {
  position: relative;
  overflow: hidden;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
.m-draggable {
  position: absolute;
  opacity: 0.8;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
.m-node.placeholder > * {
  visibility: hidden;
}
.m-node.placeholder {
  border: 1px dashed #ccc;
}
.m-node .inner {
  position: relative;
  cursor: pointer;
  padding-left: 10px;
}
.m-node .collapse {
  position: absolute;
  left: 0;
  cursor: pointer;
}
.m-node .caret-right:before {
  content: '\25B8';
}
.m-node .caret-down:before {
  content: '\25BE';
}