fixed buttons with just an image from html::submit_button() were shown like a button after changing tag from <input type="submit" to <button

pixelegg/css/pixelegg.css

@@ -5146,6 +5146,10 @@ div#calendar-container div.calendar table tbody tr.rowhilite td {
   width: 16px;
   height: 16px;
 }
+button.image_button {
+  background: none;
+  border: none;
+}
 /*@import "../less/layout_nextmatch.less";*/
 /**
  * Less-file for egroupware

pixelegg/less/def_buttons.less

@@ -26,8 +26,8 @@
     /*.box_shadow_standard_light;*/
     .rounded (3px);
     color: @gray_100;
-    
-    
+
+
         -webkit-transition-property: background-color;
        -moz-transition-property: background-color;
          -o-transition-property: background-color;
@@ -41,7 +41,7 @@
          -o-transition-timing-function: linear;
             transition-timing-function: linear;
     background-color: @gray_30;
-    
+
 }
 
 .Complete_Button_hover{
@@ -90,12 +90,12 @@
                 padding: -0.5em;
                 background-color: @egw_color_2_e !important;
 
-                
+
                 &:before {
-                        content: ""; 
-                        font-size: 2em; 
-                        color: @egw_color_1_a; 
-                        line-height: 0.6em; 
+                        content: "";
+                        font-size: 2em;
+                        color: @egw_color_1_a;
+                        line-height: 0.6em;
                         padding-left: 0.1em;
                         padding-right: 4em;
                 }
@@ -201,7 +201,7 @@
     padding: 0px;
     margin: 7px;
     margin-left: 0px;
-    
+
     background-image: url("../images/search.png");
     background-position: center 0;
     background-size: contain;
@@ -268,7 +268,7 @@
     /*.background_color_10_gray;*/
     .box_shadow_standard_light;
     .border_normal;
-    
+
     .border_radius_button_normal;
 }
 
@@ -284,7 +284,7 @@
     .border_active;
     .border_radius_button_normal;
     .box_shadow_standard_light_inset;
-    
+
     background-color: @color_positive_action_active;
 }
 
@@ -340,4 +340,4 @@ Images svg
 /*delete*/
 img[url*="delete"]{.gradient_vertical (@gray_30, @gray_30);}
 
-//
+//

pixelegg/less/layout_loginPage.css

@@ -93,7 +93,7 @@
 #loginMainDiv div#centerBox #loginCdMessage span {
   padding: 0.5em;
   font-size: 1.2em;
-  color: rgba(103, 159, 210, 0.1);
+  color: #679fd2;
   text-shadow: -1px -1px 0px #101010, 1px 1px 0px #505050;
   width: 100%;
 }

pixelegg/less/layout_raster.less

@@ -1331,7 +1331,8 @@ div#calendar-container {
     .dimension_width_height_s;
 }
 
-
-
-//
-//
+// old image (only) buttons, which should only display an image, no button
+button.image_button {
+	background: none;
+	border: none;
+}