[bibtex] Add rofi theme

Added theme to rofi making use of dropdown possibility. Will create a
window spanning whole page (or less, depending on how many lines dmenu
command passes on), and dynamically resizing to number of items.

bibtex/.local/bin/rofi-bib-due

@@ -3,7 +3,7 @@
 exist rofi normal
 
 _rofi() {
-  rofi -dmenu -no-auto-select -i "$@"
+  rofi -dmenu -no-auto-select -i "$@" -theme themes/dropdown -p "papers" -l 25 -yoffset 20
 }
 
 bib=${1:-$BIBFILE}