Update AdminLTE to 2.4.13

• fixed scroll top bug in fixed layout mode
• updated select2 to latest version (v4.0.7)
• fixed multilevel collapse for child treeview menu
• added ability to use fontawesome 5 icon on sidebar-toggle
• changed content-wrapper calc() from % to vh & added content-wrapper calc() with collapsed header
• added parent height:auto on tree expand to avoid child overlapping
• changed bootstrap-slider from * to @dev to avoid minimum-stability error
• added ability to use img logo instead of text logo
• added ability to use brand-logo with text instead of only a text logo
• added .hidden-xs to .box-tools searchbar to avoid overlapping
• fixed collapsed sidebar-menu's sub menu indicator(angle) on hover