Removed trailing white spaces

Removed trailing whitespaces with

```sh
for file in `grep -r " $" * | cut -d : -f 1 | sort | uniq | grep -v " "`; do sed -i 's/[ \t]*$//' $file; done
```

and some handwork.

public/ng/less/gogs/dashboard.less

@@ -189,8 +189,8 @@ The dashboard page style
             }
         }
         a {
-            text-overflow: ellipsis; 
-            -o-text-overflow: ellipsis; 
+            text-overflow: ellipsis;
+            -o-text-overflow: ellipsis;
             overflow: hidden;
         }
     }