Remove some CSS that applies to images that aren't present in the current software. Also switch to version 2.8.0 of sonarqube in travis.yml since 3.0.0 does not seem to be available as a gradle plugin for this version

.travis.yml

@@ -11,7 +11,7 @@ matrix:
         sonarcloud:
           organization: "i2p"
       before_install:
-        - sed -i "1iplugins {\n    id 'org.sonarqube' version '3.0.0'\n}\n" build.gradle
+        - sed -i "1iplugins {\n    id 'org.sonarqube' version '2.8.0'\n}\n" build.gradle
     - jdk: openjdk8
 
 before_cache:

apps/routerconsole/jsp/themes/console/light/console.css

@@ -73,22 +73,6 @@ img {
      border: none;
 }
 
-img[src$="bound.png"] {
-     filter: hue-rotate(-40deg);
-}
-
-a img[src$="bound.png"] {
-     filter: hue-rotate(-40deg) drop-shadow(0 0 1px #ccf);
-}
-
-a:hover img[src$="bound.png"] {
-     filter: hue-rotate(-40deg) drop-shadow(0 0 1px #f60);
-}
-
-a img {
-     filter: drop-shadow(0 0 1px #ccf);
-}
-
 a:hover img {
      filter: drop-shadow(0 0 1px #f60);
 }