Fixes "Could not find image named" errors

Switchting the IB files to Xcode 5 introduced some kind of image reference for some of our popup buttons, which was kept when we switched back to 4.6 format.
However as this wasn't used in the 4.6 files before switchting to 5 either, I just removed that stuff.
Fix "Invalid color System, labelColor" error

At some point Xcode decided to introduce a new variant of black named "labelColor" (which is 10.10 only). This commit changes the DBView xib back to controlTextColor instead.
Add stub for SPTableContentFilterController

And with that we are back to a build that should not spam your Console upon launch. (Sorry for the future merge conflict) :)
Changed a few typedef enums to Apples new method
Mark issue for s.o. to look at
Reformatting code for modern ObjC

Replaced all [NSNumber numberWithBool:YES/NO] with the @YES/@NO literals.
Also replaced some TRUE/FALSE with their YES/NO counterparts.
Replace boxed integers in code with @ literals
Add cast for [NSApp delegate]

* (Also changed some outdated URLs)
* Replaced [NSApplication sharedApplication] with NSApp
Change [NSArray arrayWithObject:] to @[] literal

Note: [NSArray arrayWithObjects:...,nil] is left unchanged as that could possibly cause a NPE if converted to @[]
Replace some NSDictionaries with literals

* [NSDictionary dictionary] → @{}
* [NSDictionary dictionaryWithObject:forKey:] can safely be replaced. object==nil would have already thrown a NPE in the past.
* Also replaced some (hopefully safe) NSArray initializers (ie. their objects should always exist).
Fix issue #2040

Changing the query favorties/history would cause an UI inconsitency when the list was filtered before.
Attempt 1 to fix building on 10.7
Attempt 2 to fix building on 10.7, 10.8
Fix crash on export with "overwrite existing files"

This should fix #2010. A required object was not retained long enough.
Fix an exception when opening Bundle Editor

Caused by an earlier commit of mine.
Roll some duplicate code into a loop

(so the compiler can unroll it again)
Add code for utf8mb4 encoding
Touch all XIB files with Xcode 6.1.1

No"real" changes were made.
NOTE: There is actually a chance for this change to break stuff.
Add GUI option for utf8mb4 connection encoding