Some code improvements

* Some assignments simplified by using assignment operators
* Rewrite switch statement with only one case as if.
* Rewrite if-else chain as a switch statement.
* go fmt `modules/todoist/project.go` file.

modules/logger/widget.go

@@ -52,7 +52,7 @@ func (widget *Widget) contentFrom(logLines []string) string {
 		chunks := strings.Split(line, " ")
 
 		if len(chunks) >= 4 {
-			str = str + fmt.Sprintf(
+			str += fmt.Sprintf(
 				"[green]%s[white] [yellow]%s[white] %s\n",
 				chunks[0],
 				chunks[1],