Remove rotating icons for registered pro users

Accepted. The other question would be whether it might be helpful to eventually
reword some of the UI for registered users [which will be treated out of scope
for this bug, just documenting them here]

A) QuickFolders Pro License ...  => Renew License (should happen as soon as
license is expired)
B) QuickFolders Pro License Window: Add a notice at the top "Your License is
valid Until..." - I haven't thought about a way of renewing a license so that
it the term will start exactly when the existing one expires (this is slightly
tricky as it would require the original license to be transmitted to the web
shop); obviously it should be possible to renew before the expiration date.
C) Rename the button "Buy License" to "Renew License" if existing license key
was valid and is expired

One thing that is slightly problematic for removing the icons:

1) the decryption of the license key takes time so I do not automatically check
for the license key when Thunderbird starts, but I do it "on demand" when a
premium feature is used
2) I would have to change this and run the validation on startup which will
slow down Thunderbird performance for premium users (startup)

so although it sounds like a simple request, the implementation will be
slightly more complicated...

Created an attachment (id=8071) [details]
4.1.1 prerelease 38

Here is a prerelease that _automatically_ removes the animations on the options
menu and also on the QF Pro tab in options dialog (which delayed this upload by
another 3 hours; debugging style sheet changes in memory is notoriously
time-consuming) at startup. There is however one *major* caveat:

Since the JavaScript for decoding of the license key is carried out on the main
thread (and not in the background, as JavaScript is not multi-threaded) there
is a definite speed penalty. I am trying to defer this with a hard coded
timeout - in this version 1 second after QuickFolder's initializing function
has completed.

Note that the "gap" of 1555ms is in part caused by that waiting period (and not
just loading bookmarks in my system), and there might be other activities
before the system says "Creating RSA key..." - on my quad core there is about
28ms used up so I guess here it is acceptable. YMMV...


QuickFolders 18:20:54.707  [4 ms]        
bookmarks.load...
 ----------
QuickFolders 18:20:56.262  [1555 ms]     
Creating RSA key + decrypting
 ----------
QuickFolders 18:20:56.290  [28 ms]       
Decryption Complete : decrypted string = QF-xxx.xxxx@gmail.com:2016-07-12
 ----------
QuickFolders 18:20:56.291  [1 ms]        
validateLicense() - successful.
 ----------
QuickFolders 18:20:56.291  [0 ms]        
validateLicense()
 returns Valid   [1]
 ----------
QuickFolders 18:20:56.291  [0 ms]        
Premium License found - removing Animations()...

Created an attachment (id=8072) [details]
4.1.1 prerelease 53

Added some style fixes and a smaller green icon for Pro users.

Created an attachment (id=8073) [details]
4.1.1 prerelease 54

Removed test menu item ("Remove animations")

Version was also tested in Postbox / SeaMonkey.

Released in version 4.1.1, 17/07/2015