Fix installation when Plank themes folder has not been created

Author: dikiaap

install.sh

@@ -1,20 +1,17 @@
 #!/usr/bin/env bash
 
-read -p "Do you want to install Frost [Y/n]? " yn
+read -p "Do you want to install Frost [Y/n]? " response
 
-case "$yn" in
-    y|Y|yes|YES|"")
+case "$response" in
+    [yY][eE][sS]|[yY]|"")
         echo "Copying plank theme..."
+        mkdir -p $HOME/.local/share/plank/themes
         cp -Ri Frost $HOME/.local/share/plank/themes
-
         echo "Done"
-
+        exit 0
         ;;
-
     *)
         echo "Invalid input"
         exit 1
-
+        ;;
 esac
-
-exit 0