Adds a reminder

i18n/tool.txt

@@ -0,0 +1,17 @@
+List all forms:
+
+    find .. -iname *.ui
+ 
+List all files containing ".tr":
+
+    grep -rin "\.tr(" ../manuskript > list.txt
+
+List all files containing ".translate":
+
+    grep -rin "\.translate(" ../manuskript >> list.txt
+    
+Then clean list.txt, and copy it in LibreOffice Calc, then:
+- Data, Filter, Advanced
+- From: whole column
+- No duplication
+- → filter