JS backend: remove dangerous package, correct translation for call, assignments, binary operations, support try...catch as expression

#KT-5576 Fixed
 #KT-5594 Fixed
 #KT-3166 Fixed
 #KT-5545 Fixed
 #KT-5594 Fixed
 #KT-5258 Fixed

JS backend: fix KT-4879: extra side effect when use when in default arguments

 #KT-4879 Fixed

JS backend: improve and fix WhenTranslator, fix order of evaluation for condtitions, fix KT-5263 (JS: extra tmp when initialize val in when by expression with if)

 #KT-5263 Fixed

js/js.translator/testData/expression/evaluationOrder/cases/evaluationOrder2.kt

@@ -0,0 +1,29 @@
+// Order of evaluation differs for JVM and Javascript backend
+// http://youtrack.jetbrains.com/issue/KT-5254
+
+package foo
+
+var s = ""
+
+fun a():String {
+    s += "A"
+    return ""
+}
+
+fun b():String {
+    s += "B"
+    return ""
+}
+
+fun c():String {
+    s += "C"
+    return ""
+}
+
+
+fun box(): String {
+    var res = (if(true) {a()} else "") + b() + (if (true) {c()} else "")
+    assertEquals("ABC", s)
+
+    return "OK"
+}