Changes

* [<span style="color: green;">DONE</span>] <del>Switch the results to '''Internet Archive''' doesn't work</del>

* [<span style="color: green;">DONE</span>] <del>Switch the results to '''Internet Archive''' doesn't work</del>

* Some time when I click on the Search Entry all the toolbar is moved a bit

* Some time when I click on the Search Entry all the toolbar is moved a bit

* When the "generic book image" is shown (at the bottom left), the gray color used to fill it is not the same as the background

* [<span style="color: orange;">ALTERNATIVE</span>] When the "generic book image" is shown (at the bottom left), the gray color used to fill it is not the same as the background. ''I changed the color with is the GdkPixbuf filled to match with the darker one (style.COLOR_BUTTON_GREY) because I couldn't find how to fill the alpha of the "generic_cover.png" with the old color (style.COLOR_PANEL_GREY)''

* After searching and selecting a book, if we change the format to ''EPUB'' the ''Get Book'' button is moved a bit

* After searching and selecting a book, if we change the format to ''EPUB'' the ''Get Book'' button is moved a bit

* When the book download starts, a ''Cancel'' is shown but it doesn't have the '''X''' icon

* When the book download starts, a ''Cancel'' is shown but it doesn't have the '''X''' icon