Theia 1.5.0

Update to version 1.5.0

 - slapos node tasks to control slapos from theia
 - git uses integrated editor when opening editor
 - fix "Upload files..."
 - support rust (after a manual cargo install)
 - better plantuml support


See merge request !799
1 job for httpheader
Status Job ID Name Coverage
  External
failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python2