Bug 430802: [1.8] Override method content assist for default method generates code with errors

add I.super.foo() call when overriding default method
Fixed Bug 406274: [1.8][extract interface] Invoking 'Extract Interface'
on an interface with default method results in losing the default method
implementation
Fixed bug 414100: [1.8][quick fix] Change modifier to static for default
and abstract methods
Bug 414100 and related modifier correction quick fixes
Changed content assist filter to pass substring matches.

Change-Id: I195012e1c72fe62b927c217ac119c4c6ae0106fd
Signed-off-by: Timo Kinnunen <timo.kinnunen@gmail.com>
Improved content assist proposal ranking.

Signed-off-by: Timo Kinnunen <timo.kinnunen@gmail.com>
Bug 428139 [extract local] Extract local variable should be possible
without selection

Changes to be tried, so far.

Signed-off-by: Timo Kinnunen <timo.kinnunen@gmail.com>
Fix to Quick Assist selection context expansion not working.

Signed-off-by: Timo Kinnunen <timo.kinnunen@gmail.com>
Fixed bug 430960 [formatter] Provide examples of suitable Off/On tags
for use

Signed-off-by: Timo Kinnunen <timo.kinnunen@gmail.com>
Fixed bug 348857 [content assist] Allow to configure auto insertion
trigger characters

Added option in Content Assist settings to disable context-aware
additional insertion triggers.

Signed-off-by: Timo Kinnunen <timo.kinnunen@gmail.com>
Fixed bug 428139: [extract local] Extract local variable should be
possible without selection

Changed inlining to take outermost variable declared in a
multi-declaration instead of first one. Assigned keybindings.  Other
small finishing touches.

Signed-off-by: Timo Kinnunen <timo.kinnunen@gmail.com>
Fixed bug 428139: [extract local] Extract local variable should be
possible without selection

Improved inline and extract local variable Quick Assists to work on a
line when invoked in whitespace before or after a statement.

Signed-off-by: Timo Kinnunen <timo.kinnunen@gmail.com>