* main.cpp: removed path checking and db loading
 * card database: merge card loading methods into a single one
 * settings cache: take care of returning safe paths for decks,
replays, etc..
 * main window: if db loading fails (eg. first run), propose to run
oracle

NSIS: propose to run cockatrice instead of oracle

Rework card database loading

 * Move carddatabase-related method out of deckeditor tab
 * Load cards in another thread and render them progressively
 * Optimize database reload after enabled sets change

Fix deck editor column width

 * removed the noCard hack.
 * getCard() no more creates cards instead of just returning existing
ones
 * Fix the “edit tokens” dialog.
 * PictureLoader: avoid trying to download twice the same card
 * PictureLoader: correct return of card background
 * AbstractCardItem: avoid recalculating card color at every paint

Use a different file to save custom tokens

Misc required improvements

 * Use nullptr;
 * Refactor CardInfoWidget to use CardInfoPicture and CardInfoText
instead of duplicating code;
 * Added CardInfo::getColorChar()
 * Fixed some potential crashes
 * removed dead code related to CardInfoWidget
 * Don't require a restart after adding a new custom sets file
 * Bump CMake requirements to 3.1

See https://github.com/Cockatrice/Cockatrice/pull/1340 for details.

See https://github.com/Cockatrice/Cockatrice/pull/1340 for details.

+ Can be used for setting client size and closing the client.

Will expand on by sending client alerts to the tray.

Updated to push message notifactions to the toolbar

Preview image:

Added setting to enable/disable message popups

Added functionality

+ updated popup message and translation
+ Double clicking tray icon will now bring up the app/minimize it
+ can now be alerted of mentions
+ added setting to set if you want mentions on desktop
+ clicking mention message will take you to the main chat
+ added translations for icon menu
+ removed maximize/minimize/restore from menu, not needed.

Added disconnect

+ Disconnects any previous message slots/signals from the system icon
message bubble

Ref #127

moderators can override game restrictions and kick players when spectating; game host privileges shift when host leaves