Should fix #412

- Removed comments as-per request

- removed unused commented out code

+ removed getters and setters comment

+ Updated DELTA variable to more suitable name:
ROTATION_DEGREES_PER_FRAME

+ Added additional comment explaining what DELTA is.

Removed inline logic to static variable, slight performance increase.

Wasnt happy with the first gradient, too much white. Now uses 2 shades
or purple.

+ Added a fade to inactive players TableZone
+ Refreshed TableZone, HandZone and DeckView  default background colors

+ Cards now animate smoother and faster
+ removed redundant computations performed each frame

+ changed from 50ms to 25ms between update calls.

I added a check to see if the event PT is empty, if it is, we try and
use the PT from the cards.xml. In resp to issue #330.

Used tr() function for auto-connect label. Changed formatting to adhere to coding style guidelines. 'Save Password' setting is now saved when cancelling the Connect dialog

Added 'auto connect' checkbox to connect dialog. When the main window becomes active for the first time and auto connect is set to true, it will call connectToServer at that point.

Cockatrice can now load images both with and without .full. Will need to clean-up bool stripped (used to determine .full suffix inclusion).

Running cockatrice in valgrind i didn't found any bad memory leak
(good!), but only a few jumps depending on uninitialized variables.
Even if the possibility of crashes are remote, it's nice to sort them
out.

I should probably bust this out to a method.

Cherry-picked b9cb61abd05f83c67740aafa5e1e6939143547e4

Moved the button from the paths section to be below the "Download high-quality card pictures" checkbox. Button now reads "Reset/Clear Downloaded Pictures". Removed "Path to"s from card/token database, hand/stack/table/player info background, and card back labels.

Added notification messages informing users of the success or failure of clearing downloaded images.

Added a button and the functionality to clear all downloaded images (all images within subfolders at picsPath/downloadedPics) under Settings.