Improve view picture

src/main/java/NTNU/IDATT1002/controllers/Explore.java

src/main/java/NTNU/IDATT1002/controllers/ExploreAlbums.java

src/main/java/NTNU/IDATT1002/controllers/Search.java

src/main/java/NTNU/IDATT1002/controllers/ViewAlbum.java

src/main/java/NTNU/IDATT1002/controllers/ViewImage.java

src/main/resources/NTNU/IDATT1002/explore.fxml

src/main/resources/NTNU/IDATT1002/view_album.fxml

src/main/resources/NTNU/IDATT1002/view_image.fxml