Correct vote display in poll card for walletholder vote(s)

The handling for last vote did not really work correctly in the case
where the walletholder votes multiple times. Because of the way the voting
system handles duplicate outputs in the vote tallying, using the last vote
only does not necessarily contain the entire weight or all the choices for
the walletholder.

This commit implements showing each choice that has weight  and the weight
on each one.

src/gridcoin/voting/result.cpp

@@ -1248,7 +1248,11 @@ void PollResult::TallyVote(VoteDetail detail)
 
     if (detail.m_ismine != ISMINE_NO) {
         m_self_voted = true;
-        m_self_vote_detail = detail;
+
+        m_self_vote_detail.m_amount += detail.m_amount;
+        m_self_vote_detail.m_mining_id = detail.m_mining_id;
+        m_self_vote_detail.m_magnitude = detail.m_magnitude;
+        m_self_vote_detail.m_ismine = detail.m_ismine;
     }
 
     for (const auto& response_pair : detail.m_responses) {
@@ -1258,6 +1262,22 @@ void PollResult::TallyVote(VoteDetail detail)
         m_responses[response_offset].m_weight += response_weight;
         m_responses[response_offset].m_votes += 1.0 / detail.m_responses.size();
         m_total_weight += response_weight;
+
+        if (detail.m_ismine != ISMINE_NO) {
+            bool choice_found = false;
+
+            for (auto& choice : m_self_vote_detail.m_responses) {
+                if (choice.first == response_offset) {
+                    choice.second += response_weight;
+                    choice_found = true;
+                    break;
+                }
+            }
+
+            if (!choice_found) {
+                m_self_vote_detail.m_responses.push_back(std::make_pair(response_offset, response_weight));
+            }
+        }
     }
 
     m_votes.emplace_back(std::move(detail));

src/qt/forms/voting/pollcard.ui

@@ -201,14 +201,14 @@
         <item row="2" column="0">
          <widget class="QLabel" name="myLastVoteAnswerTextLabel">
           <property name="text">
-           <string>Your Last Vote:</string>
+           <string>Your Vote(s):</string>
           </property>
          </widget>
         </item>
         <item row="2" column="2">
          <widget class="QLabel" name="myVoteWeightTextLabel">
           <property name="text">
-           <string>Your Vote Weight:</string>
+           <string>Your Vote Weight(s):</string>
           </property>
          </widget>
         </item>

src/qt/voting/pollcard.cpp

@@ -39,6 +39,7 @@ PollCard::PollCard(const PollItem& poll_item, QWidget* parent)
         ui->myPercentAVWLabel->setText("N/A");
     } else {
         QString choices_str;
+        QString weights_str;
 
         int64_t my_total_weight = 0;
 
@@ -49,11 +50,17 @@ PollCard::PollCard(const PollItem& poll_item, QWidget* parent)
                 choices_str = QString(poll_item.m_choices[choice.first].m_label);
             }
 
+            if (!weights_str.isEmpty()) {
+                weights_str += ", " + QString::number(choice.second / COIN);
+            } else {
+                weights_str = QString::number(choice.second / COIN);
+            }
+
             my_total_weight += choice.second / COIN;
         }
 
         ui->myLastVoteAnswerLabel->setText(choices_str);
-        ui->myVoteWeightLabel->setText(QString::number(my_total_weight));
+        ui->myVoteWeightLabel->setText(weights_str);
         if (poll_item.m_active_weight) ui->myPercentAVWLabel->setText(QString::number((double) my_total_weight
                                                                                       / (double) poll_item.m_active_weight
                                                                                       * (double) 100.0, 'f', 4) + '\%');