In popup for select item key on form=create Items are displayed two columns: Key and Name for description help.

Width of these columns are dynamically sized, but it seems very ugly, because for item type Zabbix agent and Zabbix agent (active) is in list very long item key: vfs.dir.count with 10 parameters.

With inserting space in the middle of parameters this text will be wrapped and in popup column for Key size is shortened. Second Name column use then more space in rest width and less wrapped text in next lines. PatchFile for ./zabbix/include/classes/items/CHelpItems.php with inserting space char in lines 272 and 578 on 101 column.

Finaly this popup with less lines and white-space between Items is shorter and better for reading.

Also with implementing customizable width with new macro definition in include definition file like('ZBX_ACTIONS_POPUP_MAX_WIDTH' ) in ZBXNEXT-4784 , we also could set max-width in inline style for larger value then 1024, which is in css definition for .modal-popup.overlay-dialogue