Got the installer working. Fixed a few bugs including a nasty-to-debug issue where the lang_id was being hardcoded during installation, resulting in strings being inserted with the wrong lang_id causing an infinfinite loop with fetch() throwing a "no strings" error and using template (which calls fetch()) to complain
/****************************************************************
Docking Boxes core CSS: YOU MUST NOT CHANGE OR OVERRIDE THESE
*****************************************************************/
.dbx-clone {
position:absolute;
visibility:hidden;
}
.dbx-clone, .dbx-clone .dbx-handle-cursor {
cursor:move !important;
}
.dbx-dummy {
display:block;
width:0;
height:0;
overflow:hidden;
}
.dbx-group, .dbx-box, .dbx-handle {
position:relative;
display:block;
}
/****************************************************************
avoid padding, margins or borders on dbx-box,
to reduce visual discrepancies between it and the clone.
overall, dbx-box is best left as visually unstyled as possible
*****************************************************************/
.dbx-box {
margin:0;
padding:0;
border:none;
}