Add the ability to set user password and email

Closes #69 (closed)

Complementary BE MR pleroma!2149 (merged) (needs to be merged first)

Screenshots:

mobile

src/views/users/components/SecuritySettingsModal.vue

 <template>
   <el-dialog
     :before-close="close"
-    :show-close="false"
     :title="$t('userProfile.securitySettings.securitySettings')"
     :visible="visible"
     class="security-settings-modal">
@@ -61,12 +60,6 @@
         {{ $t('userProfile.securitySettings.submit') }}
       </el-button>
     </el-row>
-    <br>
-    <span slot="footer">
-      <el-button @click="close">
-        {{ $t('userProfile.securitySettings.close') }}
-      </el-button>
-    </span>
   </el-dialog>
 </template>