If you find that it takes you too much time to edit tasks, adding Quick Edit Actions buttons (marked with the blue rectangle) might be a solution. By adding these buttons you can save a few clicks and have your most frequent actions available as soon as you click on a task.
To add these buttons, you should open the Sidebar, then navigate to "Account/Settings" and from there to go "Settings". Once there, scroll down until you see "Quick Edit Actions" and tap on "Configure..." where you can choose if you want to add these buttons for tasks or for projects.
To add a new button, just press on the plus icon on the top-right and you'll be able to choose from the variety of buttons.