Added a new abstract theme which is based on Vimix

Changes:

       Added a new abstract theme which based on Vimix.

Fixes:

       Fixed a tiny bug in the StylishDark install script.

grub-theme-slaze/Install

@@ -0,0 +1,47 @@
+#!/bin/bash
+
+# Slaze - Grub2 Abstract Theme
+
+ROOT_UID=0
+
+# Welcome message
+echo -e "\n\t**********************************\n\t*  Slaze - Grub2 Abstract Theme  *\n\t**********************************"
+
+# Check command avalibility
+function has_command() {
+    command -v $1 > /dev/null
+}
+
+echo -e "\nChecking for root access..."
+
+# Checking for root access and proceed if it is present
+if [ "$UID" -eq "$ROOT_UID" ]; then
+
+  # Create themes directory if not exists
+  echo -e "Checking for the existence of themes directory..."
+  mkdir -p /boot/grub/themes
+
+  # Copy Slaze
+  echo -e "Installing Slaze theme..."
+  cp -a Slaze /boot/grub/themes
+
+  # Set Slaze
+  echo -e "Setting Slaze as default..."
+  grep "GRUB_THEME=" /etc/default/grub 2>&1 >/dev/null && sed -i '/GRUB_THEME=/d' /etc/default/grub
+  echo "GRUB_THEME=\"/boot/grub/themes/Slaze/theme.txt\"" >> /etc/default/grub
+
+  # Update grub config
+  echo -e "Updating grub config..."
+  if has_command update-grub; then
+    update-grub
+  elif has_command grub-mkconfig; then
+    grub-mkconfig -o /boot/grub/grub.cfg
+  fi
+
+  # Success message
+  echo -e "\n\t          ***************\n\t          *  All done!  *\n\t          ***************\n"
+
+else
+  # Error message
+  echo -e "\n\t  ******************************\n\t  *  Error! -> Run me as root  *\n\t  ******************************\n"
+fi