Remove dependency to popup package
Remove dependency to popup package

Show error message in minibuffer instead in popup when clicking on an
error button.

abingham/emacs-ycmd,phst/emacs-ycmd,phst/emacs-ycmd,abingham/emacs-ycmd,abingham/emacs-ycmd,phst/emacs-ycmd,abingham/emacs-ycmd,ptrv/emacs-ycmd,ptrv/emacs-ycmd,ptrv/emacs-ycmd,emacsmirror/ycmd,ptrv/emacs-ycmd,emacsmirror/ycmd,ptrv/emacs-ycmd,phst/emacs-ycmd,phst/emacs-ycmd,emacsmirror/ycmd,abingham/emacs-ycmd,emacsmirror/ycmd,abingham/emacs-ycmd,phst/emacs-ycmd,ptrv/emacs-ycmd,emacsmirror/ycmd,emacsmirror/ycmd