Fix regression for username fallback

While usernames were now picked up correctly as a fallback from the
filename if none were present in the fields themselves, if there were
any in the fields the program would return an empty string.

This fixes it for both cases, the username existing in the entry fields
or only in the filename. Entry fields will still take precedence.

pass-pick

@@ -101,7 +101,7 @@ get_config() {
 
 	# return the first config file with a valid path
 	for config in "${locations[@]}"; do
-        if [[ -n "$config" && -f "$config" ]]; then
+		if [[ -n $config && -f $config ]]; then
 			# see if the config has been given a value
 			local val
 			val="$(_parse_config "$config" "$1")"
@@ -208,6 +208,8 @@ show_username() {
 	result=$(_p_get_field "$1" "${PASS_USERNAME_FIELD}")
 	if [ -z "$result" ]; then
 		echo "${1##*/}"
+	else
+		echo "$result"
 	fi
 }
 
@@ -285,8 +287,8 @@ entrymenu() {
 
 	local field
 	field=$(
-        printf "password: %s\n%s" "$pass" "$(list_fields "$entry")" |
-            _picker \
+		printf "password: %s\n%s" "$pass" "$(list_fields "$entry")" \
+			| _picker \
 				-kb-accept-entry "" \
 				-kb-custom-1 "$k_entrymenu_fill" \
 				-kb-custom-2 "$k_entrymenu_clip" \
@@ -363,8 +365,8 @@ main() {
 	open_coffin
 
 	entry="$(
-        list_passwords |
-            _picker -kb-accept-entry "" \
+		list_passwords \
+			| _picker -kb-accept-entry "" \
 				-kb-custom-1 "$k_autofill" \
 				-kb-custom-2 "$k_clip_user" \
 				-kb-custom-3 "$k_clip_pass" \