refactor: moved codehints icon colors to core_ui_variables file

Author: devvaannsh

src/styles/brackets_core_ui_variables.less

@@ -272,3 +272,7 @@
 @dark-bc-codehint-desc:              #2c2c2c;
 @dark-bc-codehint-desc-type-details: #46a0f5;
 @dark-bc-codehint-desc-documentation:#b1b1b1;
+
+// CSS Codehint icon
+@css-codehint-icon:                 #2ea56c;
+@dark-css-codehint-icon:            #146a41;

src/styles/brackets_patterns_override.less

@@ -703,14 +703,12 @@ a:focus {
     position: absolute;
     right: 0;
     margin-top:-2px;
-    color: #2ea56c !important;
+    color: @css-codehint-icon  !important;
     .dark& {
-        color: #146a41 !important;
+        color: @dark-css-codehint-icon !important;
     }
 }
 
-
-
 .emmet-css-code-hint {
   visibility: hidden;
 }
@@ -723,9 +721,9 @@ a:focus {
   font-size: 0.85em !important;
   font-weight: @font-weight-semibold;
   letter-spacing: 0.3px;
-  color: #2ea56c !important;
+  color: @css-codehint-icon !important;
   .dark& {
-    color: #146a41 !important;
+    color: @dark-css-codehint-icon !important;
   }
 }