PossibleCandidates get saved to their own database now

CHANGED VotingController:
    - changed 'candidateSaving' possibleCandidates get Located by name and category and get saved now

CHANGED PossibleCandidateRepository:
    - removed 'findByNameAndCategoryID'
    - added 'findByNameAndCategory'

ADDED addingCandidates.css:
    - added basic styling

CHANGED voting.css:
    - bug that div gets cut off resolved

CHANGED addingCandidates.html:
    - changed display method from table to div

CHANGED: voting.html:
    - added div to style the site (bugfix)

src/main/resources/static/styles/addingCandidates.css

@@ -0,0 +1,64 @@
+body {
+    background-color: rgb(44, 49, 54);
+    font-family: Arial, Helvetica, sans-serif;
+}
+
+.center-screen {
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
+    align-items: center;
+    text-align: center;
+}
+
+.centered {
+    background: transparent;
+    margin: 0 auto;
+    padding: 20px;
+    width: 100%;
+    overflow: auto;
+}
+
+h1 {
+    margin-top: 5%;
+    color: #FFF;
+    margin-bottom: 5%;
+}
+
+h2.categoryHeader {
+    color: #FFF;
+}
+
+input {
+    background: #bb1515b2;
+    border: none;
+    color: #FFF;
+    font-size: .875rem;
+    font-weight: normal;
+    text-transform: uppercase;
+    text-align: left;
+    transition: opacity .25s .5s;
+}
+
+#submitButton {
+    margin-top: 5%;
+    margin-bottom: 5%;
+    border: 0;
+    outline: 0;
+    background: #bb1515;
+    color: rgba(255, 255, 255, 0.85);
+    font-size: 2rem;
+    width: 500px;
+    letter-spacing: .0625rem;
+    border-radius: 12px;
+    box-shadow: 0 3px 5px 1px rgba(0, 0, 0, 0.25);
+    text-shadow: 0 -2px 0 rgba(0, 0, 0, 0.25), 0 1px 0 rgba(255, 255, 255, 0.2);
+}
+
+html,
+body {
+    width: 100%;
+    height: 100%;
+    background-image: linear-gradient(to bottom right, #111E25 0%, #111 100%) fixed;
+    font-family: 'Lato', sans-serif;
+}

src/main/resources/static/styles/voting.css

@@ -9,7 +9,14 @@ body {
     justify-content: center;
     align-items: center;
     text-align: center;
-    min-height: 100vh;
+}
+
+.centered {
+    background: transparent;
+    margin: 0 auto;
+    padding: 20px;
+    width: 100%;
+    overflow: auto;
 }
 
 h1 {