make completion stats prefix-independent, make prefix more important a weighing criterion (IDEA-165932, also needed for IDEA-166442)

java/java-tests/testData/codeInsight/completion/normalSorting/AbandonSameStatsForDifferentQualifiers.java

@@ -1,11 +0,0 @@
-class Foo1 { boolean method1() {} }
-class Foo2 { boolean method2() {} }
-class Foo3 { boolean method3() {} }
-
-public class MyFirstTestClassFoo {
-
-  void foo(Foo1 f1, Foo2 f2, Foo3 f3) {
-    f1.<caret>
-  }
-
-}

java/java-tests/testData/codeInsight/completion/normalSorting/ExpectedTypeIsMoreImportantThanCase.java

@@ -1,9 +0,0 @@
-class Foo {
-  boolean ENABLED;
-  void enable() {}
-
-  {
-    if (!en<caret>)
-  }
-
-}

java/java-tests/testData/codeInsight/completion/normalSorting/StatisticsByPrefix.java

@@ -1,6 +0,0 @@
-class FooBar {
-  int _foo1, _foo2, _boo1, _boo2, _goo1, _goo2;
-  {
-    <caret>
-  }
-}