fix minor styling issues in installer

- margins
- paddings
- alignments of icons

administrator/templates/atum/scss/blocks/_global.scss

@@ -166,6 +166,8 @@ body .container-main {
 a[href*="//"]:not([href*="javascript://"]):before {
   font: normal normal normal 14px/1 FontAwesome;
   content: "\f08e  ";
+  transform: translateY(2px);
+  display: inline-block;
 }
 
 #wrapper{

administrator/templates/atum/scss/blocks/_header.scss

@@ -206,13 +206,15 @@
 
   .joomla-version {
     margin-right: .9rem;
-    margin-bottom: 0;
+    margin-bottom: .5rem;
     font-size: $h5-font-size;
     color: var(--atum-special-color);
     font-size:$font-size-vsm;
     &:before{
       font: normal normal normal 23px/1 FontAwesome;
       content: "\f1aa  ";
+      transform: translateY(5px);
+      display: inline-block;
     }
 
   }

installation/template/scss/template.scss

@@ -27,6 +27,19 @@ body {
   display: flex;
   flex-direction: column;
   min-height: 100vh;
+  header {
+    .logo {
+      width: auto;
+    }
+    .page-title {
+      visibility: hidden;
+      width: 1px;
+      height: 1px;
+    }
+  }
+  footer {
+    padding: 1rem;
+  }
 }
 
 
@@ -45,6 +58,8 @@ body {
   margin-bottom: 20px;
   background-color: #fff;
   box-shadow: 0 0 2px rgba(52, 58, 67, .1), 0 2px 5px rgba(52, 58, 67, .08), 0 5px 15px rgba(52, 58, 67, .08);
+  width: calc(100% - 2rem);
+  margin-left: 1rem;
   &.active {
     display: block;
   }