Add +helm-posframe-border-width option

Controls posframe's internal-border-width

modules/completion/helm/autoload/posframe.el

@@ -22,7 +22,7 @@ bottom, which is easier on the eyes on big displays."
   (posframe-show
    (setq +helm--posframe-buffer buffer)
    :poshandler +helm-posframe-handler
-   :internal-border-width (truncate (/ (frame-fringe-width) 2))
+   :internal-border-width +helm-posframe-border-width
    :respect-header-line t
    :respect-mode-line t
    :width

modules/completion/helm/config.el

@@ -24,6 +24,10 @@ a cons cell representing the X and Y coordinates. See
   "The text-scale to use in the helm childframe. Set to nil for no scaling. Can
 be negative.")
 
+(defvar +helm-posframe-border-width 8
+  "The text-scale to use in the helm childframe. Set to nil for no scaling. Can
+be negative.")
+
 
 ;;
 ;; Packages