form: change popup title for msp file-picker popup
refs #3939
msp: make the MSP gateway URL variable, add proxy access_token support
add msp strongbox module
strongbox: remove id parameter to the /myspace/strongbox/pick/ url, it's unused
adapt strongbox support to the revised file widget (#1959)
move "pick a file from the strongbox" link after the hint (#2441)
avoid some possible but unreproduced exception in file upload handling
Make picking a file from the strongbox work
First pass at a strongbox