update categories of icons

src/_icons/bleach-off.svg

@@ -1,6 +1,6 @@
 ---
-tags: [clothing, washing, chemical, laundry]
 category: Laundry
+tags: [clothing, washing, chemical, laundry]
 unicode: "f2f2"
 version: "1.84"
 ---

src/_icons/ironing-steam-off.svg

@@ -1,6 +1,6 @@
 ---
-tags: [clotches, housework, iron, smooth, water]
 category: Laundry
+tags: [clotches, housework, iron, smooth, water]
 unicode: "f2f8"
 version: "1.84"
 ---

src/_icons/thumb-up-off.svg

@@ -1,4 +1,5 @@
 ---
+category: System
 unicode: "f437"
 version: "1.94"
 ---

src/_icons/tower-off.svg

@@ -1,6 +1,6 @@
 ---
-tags: [building, castle, fortress, palace]
 category: Buildings
+tags: [building, castle, fortress, palace]
 version: "1.81"
 unicode: "f2ca"
 ---

src/_icons/wash-dry-off.svg

@@ -1,6 +1,6 @@
 ---
-tags: [laundry, clean, clear, clothes]
 category: Laundry
+tags: [laundry, clean, clear, clothes]
 unicode: "f301"
 version: "1.84"
 ---

src/_icons/wash-dryclean-off.svg

@@ -1,6 +1,6 @@
 ---
-tags: [laundry, clean, clear, clothes]
 category: Laundry
+tags: [laundry, clean, clear, clothes]
 version: "1.85"
 unicode: "f323"
 ---

src/_icons/wash-off.svg

@@ -1,6 +1,6 @@
 ---
-tags: [laundry, clean, clear, clothes]
 category: Laundry
+tags: [laundry, clean, clear, clothes]
 unicode: "f307"
 version: "1.84"
 ---