Astra_Customizer::generate_font_dropdown()

		public function generate_font_dropdown() {

			ob_start();

			?>

			<option value="inherit"><?php esc_html_e( 'Default System Font', 'astra' ); ?></option>
			<optgroup label="Other System Fonts">

			<?php

			$system_fonts = Astra_Font_Families::get_system_fonts();
			$google_fonts = Astra_Font_Families::get_google_fonts();

			foreach ( $system_fonts as $name => $variants ) {
				?>

				<option value="<?php echo esc_attr( $name ); ?>" ><?php echo esc_html( $name ); ?></option>
				<?php
			}

			// Add Custom Font List Into Customizer.
			do_action( 'astra_customizer_font_list', '' );

			?>
			<optgroup label="Google">

			<?php
			foreach ( $google_fonts as $name => $single_font ) {
				$variants = astra_get_prop( $single_font, '0' );
				$category = astra_get_prop( $single_font, '1' );

				?>
				<option value="<?php echo "'" . esc_attr( $name ) . "', " . esc_attr( $category ); ?>"><?php echo esc_html( $name ); ?></option>

				<?php
			}

			return ob_get_clean();
		}