separate label in template from type

public/app/core/components/sql_part/sql_part.ts

@@ -2,6 +2,7 @@ import _ from 'lodash';
 
 export class SqlPartDef {
   type: string;
+  label: string;
   params: any[];
   defaultParams: any[];
   renderer: any;
@@ -10,6 +11,7 @@ export class SqlPartDef {
 
   constructor(options: any) {
     this.type = options.type;
+    this.label = options.label;
     this.params = options.params;
     this.defaultParams = options.defaultParams;
     this.renderer = options.renderer;

public/app/core/components/sql_part/sql_part_editor.ts

@@ -4,7 +4,7 @@ import coreModule from 'app/core/core_module';
 
 var template = `
 <div class="dropdown cascade-open">
-<a ng-click="showActionsMenu()" class="query-part-name pointer dropdown-toggle" data-toggle="dropdown">{{part.def.type}}</a>
+<a ng-click="showActionsMenu()" class="query-part-name pointer dropdown-toggle" data-toggle="dropdown">{{part.def.label}}</a>
 <span>(</span><span class="query-part-parameters"></span><span>)</span>
 <ul class="dropdown-menu">
   <li ng-repeat="action in partActions">

public/app/plugins/datasource/postgres/query_part.ts

@@ -85,6 +85,7 @@ function addColumnStrategy(selectParts, partModel, query) {
 
 register({
   type: 'column',
+  label: 'Column:',
   addStrategy: addColumnStrategy,
   params: [{ type: 'column', dynamicLookup: true }],
   defaultParams: ['value'],
@@ -93,6 +94,7 @@ register({
 
 register({
   type: 'aggregate',
+  label: 'Aggregate:',
   addStrategy: replaceAggregationAddStrategy,
   params: [{name: 'name', type: 'string', dynamicLookup: true}],
   defaultParams: ['avg'],
@@ -101,6 +103,7 @@ register({
 
 register({
   type: 'math',
+  label: 'Math:',
   addStrategy: addMathStrategy,
   params: [{ name: 'expr', type: 'string' }],
   defaultParams: [' / 100'],
@@ -109,6 +112,7 @@ register({
 
 register({
   type: 'alias',
+  label: 'Alias:',
   addStrategy: addAliasStrategy,
   params: [{ name: 'name', type: 'string', quote: 'double' }],
   defaultParams: ['alias'],
@@ -118,6 +122,7 @@ register({
 
 register({
   type: 'time',
+  label: 'time',
   params: [
     {
       name: 'interval',