Merge branch 'dev' into 'master'

Dev

See merge request turris/reforis/foris-js!215

src/bootstrap/Spinner.css

@@ -1,11 +1,3 @@
-.spinner-fs-wrapper {
-    position: fixed;
-    top: 50%;
-    left: 50%;
-    transform: translate(-50%, -50%);
-    z-index: 1101; /* increase z-index by 1 to ensure it's on top of spinner-fs-background */
-}
-
 .spinner-wrapper .spinner-border {
     width: 4rem;
     height: 4rem;
@@ -15,8 +7,10 @@
 .spinner-fs-background {
     background-color: rgba(2, 2, 2, 0.5);
     color: rgb(230, 230, 230);
-    width: 100vw;
-    height: 100vh;
+    position: fixed;
+    width: 100%;
+    height: 100%;
+    top: 0;
 
     display: flex;
     align-items: center;