fixed an issue causing secrets only to be clickable if tooltips are enabled.
code cleanup
new import option: if last game was in "no deck"-mode, import played cards as new deck (#119)
tray icon balloon stays open longer than intended, removed for now (#120)
fixed performance issues caused by TabControlTracker_SelectionChanged being called more often than excepted and UpdateLayout()
possible fix for performance issues caused by mouse hook (not sure if this has any negative effects)
imported decks directly get sorted (#119)
clear log file after each game, should improve performance when switching decks or restarting the tracker significantly
Fix timer window dimensions not being saved
Use consistent types for window dimension and pos
Fix saving window positions with multiple screens

With a multi-screen setup, pixel coordinates are expressed relative to
the top left of the system's default screen. This means that, with two
screens where the default is on the right, the x-coordinates of the
pixels on the left screen are expressed as negative integers. So we
cannot assume that valid window positions are only zero or positive.

Negative positions were being used to represent 'no specific position'
as a default. That means that when the windows are created for the
first time, we let the operating system decide where to place them.

As we should not be using negative positions for this purpose, since
they are in fact a valid range of pixel positions, use nullable types
instead. The default 'no specific position' is now expressed when the
positions are null.

Unfortunately, we still need to handle the special case where the
window position is stored as -32000 in the config file. This was
the previous default position for non-main windows (timer window,
opponent window, and player window). If the user has already used
the previous version of this application, but has not yet opened
a non-main window, they will have -32000 stored in the config file.

We obviously do not want to just blindly use this otherwise valid
value as it will position the windows far off the screen for most
users. This is a bit of a hacky solution, but without config file
versioning, or telling users to recreate their config files if they
experience the issue, we don't have any other way around this.
Fix typo
Add config file version tracking

We save a CreatedByVersion string in the config file. With this in
place, we can determine which version of the application wrote the
config file when we load it. This allows us to change the semantics
of config variables in the future and have a mechanism for handling
it without breaking users' legacy config files. We are able to
interpret and update users' legacy config files to current semantics.

If the version doesn't exist in the config file, we assume it was
created prior to this commit.

With this in place, we can remove the hacky handing of when default
window positions were being stored as -32000. We no longer need to
handle this as a special case with the new multi-screen support.
See changes to OpponentWindow.xaml.cs, PlayerWindow.xaml.cs, and
'TimerWindow.xaml.cs'.
Make default window height logic more sensible
Remove PlayerWindowL default accidently added
Hide deck sorting on edit tag flyouts
Change when Mana Curve (New Deck) gets Updated

Previously, the Mana Curve was being updated every time dbListView were being updated.
Thus, on every keypress in the card search the Mana Curve was also being updated resulting in slower card search performance.

Changed the Mana Curve to being updated only when a card has been added/removed from the deck.
Merge pull request #123 from dvide/fix-timerwindow-dimensions

Fix timer window dimensions not being saved
Merge branch 'pr/n124_dvide'

Conflicts:
	Hearthstone Deck Tracker/Windows/TimerWindow.xaml.cs
Merge pull request #126 from dvide/fix-hide-sort-on-edit-tags

Hide deck sorting on edit tag flyouts