Contex menu misplaced

[jzav]

Hello,
please see https://i.imgur.com/DDDAlOi.png.
Right-clicked dd. Context menu seems to be misplaced and only partly visible.
Use ag-grid library -> https://www.ag-grid.com/
My project -> https://addons.mozilla.org/en-US/firefox/addon/at-your-command/

Code:

$(function() {
	$.contextMenu({
		selector: '.context-menu-one', 
		callback: function(key, options) {
			var m = "clicked: " + key;
			window.console && console.log(m) || alert(m); 
		},
		items: {
			"edit": {name: "Edit"},
			"cut": {name: "Cut"},
		   	"copy": {name: "Copy"},
			"paste": {name: "Paste"},
			"delete": {name: "Delete"}
		}
	});

	$('.context-menu-one').on('click', function(e){
		console.log('clicked', this);
	})    
});

Tried to add context menu via cell renderer:

function cRendererNewFolder(params) {
	params.eGridCell.addEventListener('keydown', onCellKeyDown);
	params.eGridCell.addEventListener('keyup', resetShift);
	var hodnota = '';
	if (params.value == undefined) {
		hodnota = '';
	} else {
		hodnota = params.value.toString();
		hodnota = hodnota.replace(/</g, "&lt;").replace(/>/g, "&gt;");
	}
	var icon = browser.extension.getURL('icons/iconfinder_Folder_Win_1215244.png');
	var element = document.createElement("span");
	element.style = "padding-left:" + (params.data.indent * 21) + "px";
	var imageElement = document.createElement("img");
	imageElement.src = icon;
	imageElement.width = "18";
	imageElement.height = "18";
	imageElement.style = "vertical-align: middle;"
	element.appendChild(imageElement);
	var textElement = document.createTextNode(' ' + hodnota);
	element.appendChild(textElement);
	element.className = "context-menu-one";
    return element;
}